EXHIBIT 2.6
                                                                  EXECUTION COPY

                       STAPLED SECURITY PURCHASE AGREEMENT

                                     Between

                             MACQUARIE BANK LIMITED

                                       and

                       MACQUARIE INFRASTRUCTURE ASSETS LLC

                            DATED AS OF JUNE 7, 2004


                                TABLE OF CONTENTS



                                                                           Page
                                                                           ----
                                                                        
                                    ARTICLE I

                                   DEFINITIONS

SECTION 1.01.  Certain Defined Terms.......................................  1
SECTION 1.02.  Definitions.................................................  4

                                   ARTICLE II

                                PURCHASE AND SALE

SECTION 2.01.  Purchase and Sale of the Shares.............................  4
SECTION 2.02.  Shares......................................................  4
SECTION 2.03.  Purchase Price..............................................  5
SECTION 2.04.  Closing.....................................................  5
SECTION 2.05.  Closing Deliveries by the Seller............................  5
SECTION 2.06.  Closing Deliveries by the Purchaser.........................  5

                                   ARTICLE III

                         REPRESENTATIONS AND WARRANTIES
                                  OF THE SELLER

SECTION 3.01.  Organization, Authority and Qualification of the Seller.....  6
SECTION 3.02.  No Conflict.................................................  6
SECTION 3.03.  Consents and Approvals......................................  6

                                   ARTICLE IV
                         REPRESENTATIONS AND WARRANTIES
                                OF THE PURCHASER

SECTION 4.01.  Organization and Authority of the Purchaser.................  7
SECTION 4.02.  No Conflict.................................................  7
SECTION 4.03.  Consents and Approvals......................................  7

                                    ARTICLE V

                              ADDITIONAL AGREEMENTS

SECTION 5.01.  Regulatory and Other Authorizations; Notices and Consents...  7
SECTION 5.02.  Further Assurances..........................................  8
SECTION 5.03.  Further Action..............................................  8
SECTION 5.04.  Transfer and Similar Taxes..................................  8
SECTION 5.05.  Material Non-Public Information.............................  8


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                                   ARTICLE VI

                                 INDEMNIFICATION

SECTION 6.01.  Survival of Representations and Warranties..................  8
SECTION 6.02.  Indemnification by the Seller...............................  9
SECTION 6.03.  Indemnification by the Purchaser............................  9
SECTION 6.04.  Limits of Indemnification...................................  9
SECTION 6.05.  Tax Treatment...............................................  10

                                   ARTICLE VII

                              CONDITIONS TO CLOSING

SECTION 7.01.  Conditions to Obligations of the Seller.....................  10
SECTION 7.02.  Conditions to Obligations of the Purchaser..................  10

                                  ARTICLE VIII

                        TERMINATION, AMENDMENT AND WAIVER

SECTION 8.01.  Termination.................................................  11
SECTION 8.02.  Effect of Termination.......................................  13

                                   ARTICLE IX

                               GENERAL PROVISIONS

SECTION 9.01.  Expenses....................................................  13
SECTION 9.02.  Notices.....................................................  13
SECTION 9.03.  Public Announcements........................................  14
SECTION 9.04.  Severability................................................  14
SECTION 9.05.  Entire Agreement............................................  14
SECTION 9.06.  Assignment..................................................  14
SECTION 9.07.  Amendment...................................................  14
SECTION 9.08.  Waiver......................................................  14
SECTION 9.09.  No Third Party Beneficiaries................................  15
SECTION 9.10.  Governing Law...............................................  15
SECTION 9.11.  Counterparts................................................  15


DISCLOSURE SCHEDULE

            The Disclosure Schedule shall include the following Sections:

3.03        Consents and Approvals of the Seller
4.03        Consents and Approvals of the Purchaser

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            STAPLED SECURITY PURCHASE AGREEMENT (this "Agreement"), dated as of
June 7, 2004, between MACQUARIE BANK LIMITED, an Australian bank, (the
"Seller"), and MACQUARIE INFRASTRUCTURE ASSETS LLC, a Delaware limited liability
corporation ("MIAL"), or a wholly owned subsidiary thereof designated in writing
to the Seller subsequent to the date hereof (the "Purchaser").

            WHEREAS, the Seller intends to sell a certain number, to be
determined pursuant to Section 2.02 of this Agreement, of Stapled Securities
(the "Shares") of Macquarie Communications Infrastructure Group, comprising a
public company and a registered managed investment scheme listed on the
Australian Stock Exchange ( "MCG"); and

            WHEREAS, the Seller wishes to sell to the Purchaser, and the
Purchaser wishes to purchase from the Seller, the Shares, upon the terms and
subject to the conditions set forth herein;

            NOW, THEREFORE, in consideration of the promises and the mutual
agreements and covenants hereinafter set forth, and intending to be legally
bound, the Seller and the Purchaser hereby agree as follows:

                                   ARTICLE I

                                   DEFINITIONS

            SECTION 1.01. Certain Defined Terms. For purposes of this Agreement:

            "Action" means any claim, action, suit, arbitration, inquiry,
proceeding or investigation by or before any Governmental Authority.

            "Affiliate" means, with respect to any specified Person, any other
Person that directly, or indirectly through one or more intermediaries,
controls, is controlled by, or is under common control with, such specified
Person.

            "AUD Purchase Price" means the Purchase Price converted in
Australian dollars which can be calculated by multiplying the Purchase Price
with the applicable exchange rate, on the Pricing Date. The rate of exchange
would be the spot rate (at 12:00 noon EST) for the sale of US dollars against
the purchase of Australian dollars, in the major banks located in New York City,
determined if available, from a quotation of the Federal Reserve Bank of New
York.

            "Business Day" means any day that is not a Saturday, a Sunday or
other day on which banks are required or authorized by Law to be closed in The
City of New York or Sydney.

            "Closing Date" means a date that is on or prior to the fifth
Business Day following the IPO Closing Date, as agreed by the Purchaser and the
Seller.

            "control" (including the terms "controlled by" and "under common
control with"), with respect to the relationship between or among two or more
Persons, means the possession, directly or indirectly or as trustee, personal
representative or executor, of the power to direct or cause the direction of the
affairs or management of a Person, whether through the



ownership of voting securities, as trustee, personal representative or executor,
by contract, credit arrangement or otherwise.

            "Disclosure Schedule" means the Disclosure Schedule attached hereto,
dated as of the date hereof.

            "Encumbrance" means any security interest, pledge, hypothecation,
mortgage, lien (including environmental and tax liens), violation, charge,
lease, license, encumbrance, servient easement, adverse claim, reversion,
reverter, preferential arrangement, restrictive covenant, condition or
restriction of any kind, including any restriction on the use, voting, transfer,
receipt of income or other exercise of any attributes of ownership.

            "Governmental Authority" means any federal, national, supranational,
state, provincial, local, or similar government, governmental, regulatory or
administrative authority, agency or commission or any court, tribunal, or
judicial or arbitral body.

            "Governmental Order" means any order, writ, judgment, injunction,
decree, stipulation, determination or award entered by or with any Governmental
Authority.

            "Indemnifying Party" means the Seller pursuant to Section 6.02 and
the Purchaser pursuant to Section 6.03, as the case may be.

            "IPO" means the initial public offering of MIAT or MIAL determined
pursuant to the Underwriting Agreement for the offering.

            "IPO Closing Date" means the closing date of the IPO.

            "IPO Pricing Date" means the date on which MIAT, MIAL and the
underwriter(s) enter into an Underwriting Agreement with respect to the IPO.

            "Law" means any federal, national, supranational, state, provincial,
local or similar statute, law, ordinance, regulation, rule, code, order,
requirement or rule of law (including common law).

            "Liabilities" means any and all debts, liabilities and obligations,
whether accrued or fixed, absolute or contingent, matured or unmatured or
determined or determinable, including those arising under any Law, Action or
Governmental Order and those arising under any contract, agreement, arrangement,
commitment or undertaking.

            "Material Adverse Effect" means any circumstance, change in or
effect on MCG or any Subsidiary that, individually or in the aggregate with all
other circumstances, changes in or effects on MCG or any Subsidiary is or is
reasonably likely to be materially adverse to the business, operations, assets
or liabilities (including contingent liabilities), employee relationships,
customer or supplier relationships, results of operations or the condition
(financial or otherwise) of MCG or any Subsidiary.

            "MIAT" means Macquarie Infrastructure Assets Trust.

                                       2


            "MCIL" means Macquarie Communications Infrastructure Limited.

            "MCIT" means Macquarie Communications Infrastructure Trust.

            "Person" means any individual, partnership, firm, corporation,
limited liability company, association, trust, unincorporated organization or
other entity, as well as any syndicate or group that would be deemed to be a
person under Section 13(d)(3) of the Securities Exchange Act of 1934, as
amended.

            "Pricing Date" means the Business Day (Sydney Time) which is the IPO
Pricing Date.

            "Printing Date" means the day on which MIAT, MIAL and the
underwriter(s) print a preliminary prospectus in connection with the IPO, as
specified in a notice provided to the Seller no later than the second Business
Day prior to such Printing Date.

            "SEC" means the United States Securities and Exchange Commission.

            "Share Cap" means the number of Stapled Securities, which
constitutes 17.5% of the then number of Stapled Securities on issue, rounded
down to the nearest integer.

            "Stapled Securities" means equity securities, comprising securities
in two (or more) separate entities that have to be traded as a single stapled
security. In MCG's case, stapled securities comprise a unit in an Australian
trust (MCIT) and a share in an Australian company (MCIL). MCG's stapled security
holders have an equal number of units in MCIT and shares in the MCIL.

            "Subsidiary" of any Person means any corporation, partnership, joint
venture, limited liability company, trust or estate of which (or in which) more
than 50% of (a) the issued and outstanding capital stock having ordinary voting
power to elect a majority of the board of directors of such corporation
(irrespective of whether at the time capital stock of any other class or classes
of such corporation shall or might have voting power upon the occurrence of any
contingency), (b) the interest in the capital or profits of such limited
liability company, partnership, or joint venture or (c) the beneficial interest
in such trust or estate is at the time directly or indirectly owned or
controlled by such Person, by such Person and one or more of its other
Subsidiaries or by one or more of such Person's other Subsidiaries.

                  "Tax" or "Taxes" means (i) any and all taxes, fees, levies,
duties, tariffs, imposts, and other charges of any kind (together with any and
all interest, penalties, additions to tax and additional amounts imposed with
respect thereto) imposed by any government or taxing authority, including taxes
or other charges on or with respect to income, franchises, windfall or other
profits, gross receipts, property, sales, use, capital stock, payroll,
employment, social security, workers' compensation, unemployment compensation,
or net worth; taxes or other charges in the nature of excise, withholding, ad
valorem, stamp, transfer, value added, or gains taxes; license, registration and
documentation fees; and customs' duties, tariffs, and similar charges, (ii) any
Liability for the payment of any Tax as a result of membership in any
affiliated, consolidated, combined or unitary group of corporations and (iii)
any transferee or secondary Liability in respect of any Tax (whether imposed by
Law or contractual arrangement).

                                       3



            "Tax Returns" means any return, declaration, report, election, claim
for refund or information return or other statement or form relating to, filed
or required to be filed with any Taxing authority, including any schedule or
attachment thereto, and including any amendment thereof.

            "Trading Day" means the day when the Australian Stock Exchange is
open and trading shares (and which shares in MCG are available to be traded).

            "Underwriting Agreement" means the agreement between the
underwriters named therein, MIAT and MIAL for the purchase of equity securities
in the IPO.

            "VWAP" means the volume weighted average price of the Stapled
Securities over the VWAP Calculation Period which can be calculated by adding
the price (in Australian dollars) of each Stapled Security traded over the VWAP
Calculation Period divided by the number of Stapled Securities traded over the
same period of time.

            "VWAP Calculation Period" means the 10 Trading Days ending on the
last Trading Day prior to any determination date.

            SECTION 1.02. Definitions. The following terms have the meanings set
forth in the Sections set forth below:



              Definition                              Location
              ----------                              --------
                                                   
"Agreement".......................................    Preamble
"Basket Amount"...................................    6.04
"Closing".........................................    2.04
"Loss"............................................    6.02
"MIAL"                                                Preamble
"MCG".............................................    Recitals
"Purchaser".......................................    Preamble
"Purchase Price"..................................    2.03
"Purchaser Indemnified Party".....................    6.02
"Seller"..........................................    Preamble
"Seller Indemnified Party"........................    6.03
"Shares"..........................................    Recitals
"Transfer Taxes"..................................    5.04

                                   ARTICLE II

                                PURCHASE AND SALE

            SECTION 2.01. Purchase and Sale of the Shares. Upon the terms and
subject to the conditions of this Agreement, at the Closing, the Seller shall
sell, assign, transfer, convey and deliver, free and clear of all Encumbrances,
to the Purchaser, the Shares, and the Purchaser shall purchase the Shares.

            SECTION 2.02. Shares. The number of Stapled Securities constituting
the Shares to be sold and purchased under this Agreement shall be calculated by
dividing the AUD

                                       4



Purchase Price by the VWAP on the Pricing Date, rounded down to the nearest
integer; provided that the aggregate number of Shares shall not exceed the Share
Cap.

            SECTION 2.03. Purchase Price. In consideration of the sale and
transfer of the Shares, the parties hereto agree that, on the Closing Date, the
Purchaser shall pay and the Buyer shall receive the Purchase Price of US$ 70
million, reduced to the extent necessary to ensure that the number of Shares
acquired on the Closing Date does not exceed the Share Cap; provided that the
Purchaser shall have the option at anytime prior to the Printing Date, by giving
a written notice to the Seller, to decrease the Purchase Price to any amount not
less than US$ 40 million in the aggregate (the "Purchase Price").

            SECTION 2.04. Closing. Subject to the terms and conditions of this
Agreement, the sale and purchase of the Shares contemplated by this Agreement
shall take place at a closing (the "Closing") to be held at the offices of
Shearman & Sterling LLP, 599 Lexington Avenue, New York, New York at 10:00 A.M.
New York time on the Closing Date or such other date as is agreed between the
parties.

            SECTION 2.05. Deliveries by the Seller.

            (a)   No later than one Business Day prior to the Closing Date, the
Seller shall instruct a broker to do all things necessary to effect the transfer
on the day following the Closing Date (Sydney time) of the Shares to the Buyer;

            (b)   At or prior to the Closing Date, the Seller shall execute all
relevant documents, including share transfers, and do all other things,
including giving directions, necessary to effect the transfer of the Shares to
the Purchaser on the day (Sydney time) following Closing Date;

            (c)   On the Closing Date, the Seller shall deliver or cause to be
delivered to the Purchaser such other documents and instruments reasonably
requested by the Purchaser to consummate the transactions contemplated hereby.

            SECTION 2.06. Closing Deliveries by the Purchaser. (a) Two Business
Days prior to the Closing Date, the Purchaser shall provide the Seller with the
name and account details for the brokerage account into which the Shares are to
be transferred upon Closing;

            (b) On the Closing Date, the Purchaser shall deliver to the Seller
such other documents and instruments reasonably requested by the Seller to
consummate the transactions contemplated hereby.

            SECTION 2.06. Closing Date Deliveries by the Seller. On the Closing
Date, subject to the Purchaser complying with its obligations under section
2.07, the Seller shall deliver or cause to be delivered to the Purchaser a
receipt for the Purchase Price.

            SECTION 2.07. Closing Date Deliveries by the Purchaser. On the
Closing Date, the Purchaser shall deliver to the Seller the Purchase Price by
wire transfer in immediately available funds to a bank account in the United
States to be designated by the Seller in a written notice to the Purchaser at
least five Business Days before the Closing.

                                       5



                                  ARTICLE III

                         REPRESENTATIONS AND WARRANTIES
                                  OF THE SELLER

            As an inducement to the Purchaser to enter into this Agreement, the
Seller hereby represents and warrants to the Purchaser as follows:

            SECTION 3.01. Organization, Authority and Qualification of the
Seller. The Seller is a corporation duly organized, validly existing and in good
standing under the laws of the jurisdiction of its incorporation and has all
necessary power and authority to enter into this Agreement, to carry out its
obligations hereunder and to consummate the transactions contemplated hereby.
The execution and delivery of this Agreement by the Seller, the performance by
the Seller of its obligations hereunder and the consummation by the Seller of
the transactions contemplated hereby have been duly authorized by all requisite
action on the part of the Seller. This Agreement has been duly executed and
delivered by the Seller, and (assuming due authorization, execution and delivery
by the Purchaser) this Agreement constitutes a legal, valid and binding
obligation of the Seller, enforceable against the Seller in accordance with its
terms except as enforceability may be limited by bankruptcy, insolvency,
reorganization, moratorium or other similar laws now or hereafter in effect
relating to creditors' rights generally, and general equitable principles
(whether considered in a proceeding in equity or at law).

            SECTION 3.02. No Conflict. Except as may result from any facts or
circumstances relating solely to the Purchaser, the execution, delivery and
performance of this Agreement by the Seller does not and will not (a) violate,
conflict with or result in the breach of any provision of the certificate of
incorporation or by-laws (or similar organizational documents) of the Seller,
(b) conflict with or violate any Law or Governmental Order applicable to the
Seller or any of its respective assets, properties or businesses which is
material in the context of the transactions contemplated hereby or (c) conflict
in any material respect with, or result in any breach of, or constitute a
default under any agreement to which the Seller is a party or by which it or any
of its assets or properties may be bound.

            SECTION 3.03. Consents and Approvals. All consents which are
necessary for the execution, delivery and performance by the Seller of this
Agreement are set forth in Schedule 3.03 of the Disclosure Schedule.

                                       6



                                   ARTICLE IV
                         REPRESENTATIONS AND WARRANTIES
                                OF THE PURCHASER

            As an inducement to the Seller to enter into this Agreement, the
Purchaser hereby represents and warrants to the Seller as follows:

            SECTION 4.01. Organization and Authority of the Purchaser. The
Purchaser is a limited liability company duly organized, validly existing and in
good standing under the laws of the State of Delaware and has all necessary
corporate power and authority to enter into this Agreement, to carry out its
obligations hereunder and to consummate the transactions contemplated hereby.
The execution and delivery by the Purchaser of this Agreement, the performance
by the Purchaser of its obligations hereunder and the consummation by the
Purchaser of the transactions contemplated hereby have been duly authorized by
all requisite corporate action on the part of the Purchaser. This Agreement has
been duly executed and delivered by the Purchaser, and (assuming due
authorization, execution and delivery by the Seller) this Agreement constitutes
a legal, valid and binding obligation of the Purchaser, enforceable against the
Purchaser in accordance with its terms except as enforceability may be limited
by bankruptcy, insolvency, reorganization, moratorium or other similar laws now
or hereafter in effect relating to creditors' rights generally, and general
equitable principles (whether considered in a proceeding in equity or at law).

            SECTION 4.02. No Conflict. Except as may result from any facts or
circumstances relating solely to the Seller, the execution, delivery and
performance by the Purchaser of this Agreement does not and will not (a)
violate, conflict with or result in the breach of any provision of the
certificate of formation or operating agreement of the Purchaser, (b) conflict
with or violate any Law or Governmental Order applicable to the Purchaser or any
of its respective assets, properties or businesses which is material in the
context of the transactions contemplated hereby or (c) conflict in any material
respect with, or result in any breach of, or constitute a default under any
agreement to which the Purchaser is a party or by which it or any of its assets
or properties may be bound.

            SECTION 4.03. Consents and Approvals. All consents which are
necessary for the execution, delivery and performance by the Purchaser of this
Agreement are set forth in Schedule 4.03 of the Disclosure Schedule.

                                   ARTICLE V

                              ADDITIONAL AGREEMENTS

            SECTION 5.01. Regulatory and Other Authorizations; Notices and
Consents. (a) The Seller shall use its best efforts to obtain all
authorizations, consents, orders and approvals of all Governmental Authorities
and officials that may be or become necessary for its execution and delivery of,
and the performance of its obligations pursuant to this Agreement and will
cooperate

                                       7



fully with the Purchaser in promptly seeking to obtain all such authorizations,
consents, orders and approvals.

            (b)   The Seller shall give promptly such notices to third parties
and use its or their best efforts to obtain such third party consents as the
Purchaser may in its sole discretion deem necessary or desirable in connection
with the transactions contemplated by this Agreement.

            (c)   The Purchaser shall cooperate and use all reasonable efforts
to assist the Seller in giving such notices and obtaining such consents;
provided, however, that the Purchaser shall have no obligation to give any
guarantee or other consideration of any nature in connection with any such
notice or consent or to consent to any change in the terms of any agreement or
arrangement which the Purchaser in its sole discretion may deem adverse to the
interests of the Purchaser.

            SECTION 5.02. Further Assurances(a) . The Seller covenants and
agrees to cooperate with the Purchaser and shall use its commercially reasonable
efforts to take, or cause to be taken, all actions and to do, or cause to be
done, all things, including the making of any SEC disclosures, necessary or
desirable under applicable Law as the Purchaser may reasonably request the
Seller to take or do in connection with the initial public offering of MIAT or
any of its Subsidiaries.

            SECTION 5.03. Further Action. Each of the parties hereto shall use
all reasonable efforts to take, or cause to be taken, all appropriate action, do
or cause to be done all things necessary, proper or advisable under applicable
Law, and to execute and deliver such documents and other papers, as may be
required to carry out the provisions of this Agreement and consummate and make
effective the transactions contemplated hereby.

            SECTION 5.04. Transfer and Similar Taxes. Notwithstanding any other
provision of this Agreement to the contrary, the Purchaser shall be solely
responsible for paying all property, sales, use, privilege, transfer,
documentary, gains, stamp, duties, recording and similar Taxes and fees
(including any penalties, interest or additions) imposed upon any party in
connection with the transactions contemplated by this Agreement (collectively,
the "Transfer Taxes"). The Seller, with the assistance of the Purchaser, shall
procure any share transfer stamp required by, and accurately file all necessary
Tax Returns and other documentation with respect to, any Transfer Tax.

            SECTION 5.05. Material Non-Public Information. Each party must
notify the other party in writing immediately if at any time during the period
from the Business Day prior to the Printing Date to the Closing Date it or any
of its Affiliates possesses any material non-public information regarding MCG
and its Subsidiaries.

                                   ARTICLE VI

                                 INDEMNIFICATION

            SECTION 6.01. Survival of Representations and Warranties. (a) The
representations and warranties of the Seller contained in this Agreement shall
survive the Closing indefinitely.

                                       8



            (b)   The representations and warranties of the Purchaser contained
in this Agreement shall survive the Closing indefinitely.

            SECTION 6.02. Indemnification by the Seller. The Purchaser and its
Affiliates, officers, directors, employees, agents, successors and assigns (each
a "Purchaser Indemnified Party") shall be indemnified and held harmless by the
Seller for and against any and all Liabilities, losses, damages, claims, costs
and expenses, interest, awards, judgments and penalties (including attorneys'
and consultants' fees and expenses) actually suffered or incurred by them
(including in connection with any Action brought or otherwise initiated by any
of them) (hereinafter a "Loss"), arising out of or resulting from:

            (a)   the breach of any representation or warranty made by the
      Seller contained in this Agreement (it being understood that such
      representations and warranties shall be interpreted without giving effect
      to any limitations or qualifications as to "materiality" (including the
      word "material") or "Material Adverse Effect" set forth therein); or

            (b)   the breach of any covenant or agreement by the Seller
      contained in this Agreement.

To the extent that the Seller's undertakings set forth in this Section 6.02 may
be unenforceable, the Seller shall contribute the maximum amount that it is
permitted to contribute under applicable Law to the payment and satisfaction of
all Losses incurred by the Purchaser Indemnified Parties.

            SECTION 6.03. Indemnification by the Purchaser. The Seller and its
Affiliates, officers, directors, employees, agents, successors and assigns (each
a "Seller Indemnified Party") shall be indemnified and held harmless by the
Purchaser for and against any and all Losses, arising out of or resulting from:

            (a)   the breach of any representation or warranty made by the
      Purchaser contained in this Agreement (it being understood that such
      representations and warranties shall be interpreted without giving effect
      to any limitations or qualifications as to "materiality" (including the
      word "material") or "Material Adverse Effect" set forth therein); or

            (b)   the breach of any covenant or agreement by the Purchaser
      contained in this Agreement.

To the extent that the Purchaser's undertakings set forth in this Section 6.03
may be unenforceable, the Purchaser shall contribute the maximum amount that it
is permitted to contribute under applicable Law to the payment and satisfaction
of all Losses incurred by the Seller Indemnified Parties.

            SECTION 6.04. Limits of Indemnification.Notwithstanding anything to
the contrary contained in this Agreement: (a) an Indemnifying Party shall not be
liable for any claim for indemnification pursuant to Section 6.02 or 6.03,
unless and until the aggregate amount of indemnifiable Losses which may be
recovered from the Indemnifying Party equals or exceeds $150,000 (the "Basket
Amount"), after which the Indemnifying Party shall be liable for all

                                       9



Losses, including the Basket Amount and (b) the maximum amount of indemnifiable
Losses which may be recovered from an Indemnified Party arising out of or
resulting from the causes set forth in Section 6.02 or 6.03, as the case may be,
shall be an amount equal to the Purchase Price.

            SECTION 6.05. Indemnity Sole Remedy. The sole recourse of the
Purchaser Indemnified Party and Seller Indemnified Party for any breach of any
representation, warranty, covenant or agreement made in this Agreement shall be
the indemnification provided in Sections 6.02 and 6.03, subject to the
limitations provided in Section 6.04; provided, that the foregoing shall not
limit (i) remedies for fraud if the Purchaser Indemnified Party or Seller
Indemnified Party (as the case may be) proves actual fraud on the part of the
indemnifying party or (ii) the availability of injunctive and other equitable
relief, including without limitation, specific performance.

            SECTION 6.05. Tax Treatment. All amounts paid under the
indemnification provisions of this Agreement shall be treated as adjustments to
purchase price for all Tax purposes.

                                  ARTICLE VII

                              CONDITIONS TO CLOSING

            SECTION 7.01. Conditions to Obligations of the Seller. The
obligations of the Seller to consummate the transactions contemplated by this
Agreement shall be subject to the fulfillment or written waiver by the Seller,
at or prior to the Closing, of each of the following conditions:

            (a)   Representations, Warranties and Covenants. The representations
      and warranties of the Purchaser contained in this Agreement shall have
      been true and correct when made and shall be true and correct in all
      material respects as of the Closing, except to the extent such
      representations and warranties are as of another date, in which case, such
      representations and warranties shall be true and correct as of that date,
      in each case, with the same force and effect as if made as of the Closing,
      other than such representations and warranties as are made as of another
      date, the covenants and agreements contained in this Agreement to be
      complied with by the Purchaser on or before the Closing shall have been
      complied with in all material respects; and

            (b)   No Proceeding or Litigation. No Action shall have been
      commenced by or before any Governmental Authority against either the
      Seller or the Purchaser, seeking to restrain or materially and adversely
      alter the transactions contemplated by this Agreement which, in the
      reasonable, good faith determination of the Seller, is likely to render it
      impossible or unlawful to consummate such transactions; provided, however,
      that the provisions of this Section 7.01(b) shall not apply if the Seller
      has directly or indirectly solicited or encouraged any such Action.

            SECTION 7.02. Conditions to Obligations of the Purchaser. The
obligations of the Purchaser to consummate the transactions contemplated by this
Agreement shall be subject to

                                       10



the fulfillment or written waiver by the Purchaser, at or prior to the Closing,
of each of the following conditions:

            (a)   Representations, Warranties and Covenants. (i) The
      representations and warranties of the Seller contained in this Agreement
      shall have been true and correct when made and shall be true and correct
      as of the Closing with the same force and effect as if made as of the
      Closing, except to the extent such representations and warranties are as
      of another date, in which case, such representations and warranties shall
      be true and correct as of that date with the same force and effect as if
      made as of the Closing, and (ii) the covenants and agreements contained in
      this Agreement to be complied with by the Seller on or before the Closing
      shall have been complied with;

            (b)   No Proceeding or Litigation. No Action shall have been
      commenced or threatened by or before any Governmental Authority against
      either the Seller or the Purchaser, seeking to restrain or materially and
      adversely alter the transactions contemplated by this Agreement which, in
      the reasonable, good faith determination of the Purchaser, is likely to
      render it impossible or unlawful to consummate such transactions;
      provided, however, that the provisions of this Section 7.02(b) shall not
      apply if the Purchaser has directly or indirectly solicited or encouraged
      any such Action.

            (c)   Consents and Approvals. The Purchaser and the Seller shall
      have received, each in form and substance satisfactory to the Purchaser,
      all authorizations, consents, orders and approvals of all Governmental
      Authorities (including the Foreign Investment Review Board) and officials
      and all third party consents necessary for the consummation of the
      transactions contemplated by this Agreement;

            (d)   Financing. MIAT or MIAL shall have successfully completed the
      IPO and funds have been made available to the Purchaser in connection with
      settlement or through the Purchaser's underwriting arrangements; and

            (e)   No Material Adverse Effect. No event or events shall have
      occurred, or be reasonably likely to occur, which, individually or in the
      aggregate, have, or could have, a Material Adverse Effect.

                                  ARTICLE VIII

                        TERMINATION, AMENDMENT AND WAIVER

            SECTION 8.01. Termination.

            (a)   This Agreement may be terminated at any time prior to the
                  Closing:

                  (i)   by the Purchaser if, between the date hereof and the
                        Closing: (i) an event or condition occurs that has
                        resulted in a Material Adverse Effect, (ii) any
                        representations and warranties of the Seller contained
                        in this Agreement shall not have been true and correct
                        when made, (iii) the Seller shall not have complied in
                        all material

                                       11



                        respects with the covenants or agreements contained in
                        this Agreement to be complied with by it or (iv) the
                        Seller makes a general assignment for the benefit of
                        creditors, or any proceeding shall be instituted by or
                        against the Seller seeking to adjudicate it a bankrupt
                        or insolvent, or seeking liquidation, winding up or
                        reorganization, arrangement, adjustment, protection,
                        relief or composition of its debts under any Law
                        relating to bankruptcy, insolvency or reorganization;

                  (ii)  by the Seller if, between the date hereof and the
                        Closing: (i) any representations and warranties of the
                        Purchaser contained in this Agreement shall not have
                        been true and correct when made, (ii) the Purchaser
                        shall not have complied in all material respects with
                        the covenants or agreements contained in this Agreement
                        to be complied with by it or (iii) the Purchaser makes a
                        general assignment for the benefit of creditors, or any
                        proceeding shall be instituted by or against the
                        Purchaser seeking to adjudicate it a bankrupt or
                        insolvent, or seeking liquidation, winding up or
                        reorganization, arrangement, adjustment, protection,
                        relief or composition of its debts under any Law
                        relating to bankruptcy, insolvency or reorganization;

                  (ii)  by either the Seller or the Purchaser if the Closing
                        shall not have occurred by March 31, 2005; provided,
                        however, that the right to terminate this Agreement
                        under this Section 8.01(b) shall not be available to any
                        party whose failure to fulfill any obligation under this
                        Agreement shall have been the cause of, or shall have
                        resulted in, the failure of the Closing to occur on or
                        prior to such date;

                  (iii) by either the Purchaser or the Seller in the event that
                        any Governmental Authority (including the Foreign
                        Investment Review Board) shall have issued an order,
                        decree or ruling or taken any other action restraining,
                        enjoining or otherwise prohibiting the transactions
                        contemplated by this Agreement and such order, decree,
                        ruling or other action shall have become final and
                        nonappealable; or

                  (iv)  by the Purchaser on the Printing Day if, in its
                        reasonable commercial judgment, the purchase of the
                        Shares, at an assumed price per Share equal to the VWAP
                        on the Printing Date, would be reasonably likely to have
                        an adverse effect on the MIAT's ability to pay dividends
                        as contemplated by the preliminary prospectus in
                        connection with the IPO to be printed on the Printing
                        Date.

            (b)   This Agreement shall terminate automatically if either the
Purchaser or the Seller possesses any material non-public information regarding
MCG and its Subsidiaries at any time between the Printing Date and the Closing
Date.

                                       12



            SECTION 8.02. Effect of Termination. In the event of termination of
this Agreement as provided in Section 8.01, this Agreement shall forthwith
become void and there shall be no liability on the part of either party hereto
except (a) as set forth in Article III, Article IV, Article VI and Section 9.01
and (b) that nothing herein shall relieve either party hereto from liability for
any breach of this Agreement. If this Agreement has been automatically
terminated under section 8.01(b) and the Seller or the Buyer (as the case may
be) has not complied with their obligations under section 5.05, section 5.05
will survive termination of this Agreement until such obligations have been
fulfilled.

                                   ARTICLE IX

                               GENERAL PROVISIONS

            SECTION 9.01. Expenses. Except as otherwise specified in this
Agreement, all costs and expenses, including fees and disbursements of counsel,
financial advisors and accountants, incurred in connection with this Agreement
and the transactions contemplated by this Agreement shall be paid by the party
incurring such costs and expenses, whether or not the Closing shall have
occurred.

            SECTION 9.02. Notices. All notices, requests, claims, demands and
other communications hereunder shall be in writing and shall be given or made
(and shall be deemed to have been duly given or made upon receipt) by delivery
in person, by an internationally recognized overnight courier service, by
facsimile or registered or certified mail (postage prepaid, return receipt
requested) to the respective parties hereto at the following addresses (or at
such other address for a party as shall be specified in a notice given in
accordance with this Section 9.02):

            (a) if to the Seller:

                Macquarie Bank Limited
                1 Martin Place
                Level 10
                Sydney, Australia
                NSW 2000
                Telecopy:  011-61-2-8232-3656
                Attention:  Shemara Wikramanayake

            (b) if to the Purchaser:

                Macquarie Infrastructure Assets LLC
                600 Fifth Avenue
                21st Floor
                New York, NY  10020
                Telecopy:  212-581-8037
                Attention:  Peter Stokes

                                       13



                with a copy to:

                Shearman & Sterling LLP
                599 Lexington Avenue
                New York, NY  10022-6069
                Telecopy: (212) 848-7179
                Attention: Antonia E. Stolper, Esq.

            SECTION 9.03. Public Announcements. Neither party hereto shall make,
or cause to be made, any press release or public announcement in respect of this
Agreement or the transactions contemplated hereby or otherwise communicate with
any news media without prior notification to the other party, and the parties
hereto shall cooperate as to the timing and contents of any such press release,
public announcement or communication.

            SECTION 9.04. Severability. If any term or other provision of this
Agreement is invalid, illegal or incapable of being enforced by any Law or
public policy, all other terms and provisions of this Agreement shall
nevertheless remain in full force and effect for so long as the economic or
legal substance of the transactions contemplated hereby is not affected in any
manner materially adverse to either party hereto. Upon such determination that
any term or other provision is invalid, illegal or incapable of being enforced,
the parties hereto shall negotiate in good faith to modify this Agreement so as
to effect the original intent of the parties as closely as possible in an
acceptable manner in order that the transactions contemplated hereby are
consummated as originally contemplated to the greatest extent possible.

            SECTION 9.05. Entire Agreement. This Agreement constitutes the
entire agreement of the parties hereto with respect to the subject matter hereof
and supersedes all prior agreements and undertakings, both written and oral,
between the Seller and the Purchaser with respect to the subject matter hereof.

            SECTION 9.06. Assignment. This Agreement may not be assigned by
operation of law or otherwise without the express written consent of the Seller
and the Purchaser (which consent may be granted or withheld in the sole
discretion of the Seller or the Purchaser); provided, however, that the
Purchaser may assign this Agreement or any of its rights and obligations
hereunder to one or more wholly-owned Subsidiaries of the Purchaser without the
consent of the Seller.

            SECTION 9.07. Amendment. This Agreement may not be amended or
modified except (a) by an instrument in writing signed by, or on behalf of, the
Seller and the Purchaser or (b) by a waiver in accordance with Section 9.08.

            SECTION 9.08. Waiver. Either party to this Agreement may (a) extend
the time for the performance of any of the obligations or other acts of the
other party, (b) waive any inaccuracies in the representations and warranties of
the other party contained herein or in any document delivered by the other party
pursuant hereto or (c) waive compliance with any of the agreements of the other
party or conditions to such party's obligations contained herein. Any such
extension or waiver shall be valid only if set forth in an instrument in writing
signed by the party to be bound thereby. Any waiver of any term or condition
shall not be construed as a

                                       14




waiver of any subsequent breach or a subsequent waiver of the same term or
condition, or a waiver of any other term or condition of this Agreement. The
failure of either party hereto to assert any of its rights hereunder shall not
constitute a waiver of any of such rights. All rights and remedies existing
under this Agreement are cumulative to, and not exclusive of, any rights or
remedies otherwise available.

            SECTION 9.09. No Third Party Beneficiaries. Except for the
provisions of Article VII relating to indemnified parties, this Agreement shall
be binding upon and inure solely to the benefit of the parties hereto and their
respective successors and permitted assigns and nothing herein, express or
implied, is intended to or shall confer upon any other Person, including any
union or any employee or former employee of the Seller, any legal or equitable
right, benefit or remedy of any nature whatsoever, including any rights of
employment for any specified period, under or by reason of this Agreement.

            SECTION 9.10. Governing Law. This Agreement shall be governed by,
and construed in accordance with, the laws of New South Wales, Australia. Each
party submits to the non-exclusive jurisdiction of the courts of New South
Wales, and the courts competent to determine appeals from those courts, with
respect to any proceedings, which may be brought at any time relating to this
Agreement.

            SECTION 9.11. Counterparts. This Agreement may be executed and
delivered (including by facsimile transmission) in one or more counterparts, and
by the different parties hereto in separate counterparts, each of which when
executed shall be deemed to be an original, but all of which taken together
shall constitute one and the same agreement.

                                       15



            IN WITNESS WHEREOF, the Seller and the Purchaser have caused this
Agreement to be executed as of the date first written above by their respective
officers thereunto duly authorized.

SIGNED SEALED AND DELIVERED for and on behalf
of MACQUARIE BANK LIMITED (ABN 46 008 583
452) by its Attorneys under a Power of Attorneys
dated           , and the Attorneys
declare that the Attorneys have not received any
notice of the revocation of such Power of Attorney,
in the presence of:                                   /s/ Shemara Wikramanatake
                                                      --------------------------
                                                      Signature of Attorney

                                                      Shemara Wikramanatake
                                                      --------------------------
                                                      Name of Attorney in full

/s/ Andrea Hilbert                                    /s/ Rhea Diacopoulos
- ---------------------                                 --------------------------
Signature of Witness                                  Signature of Attorney

Andrea Hilbert                                        Rhea Diacopoulos
- ----------------------                                --------------------------
Name of Witness in full                               Name of Attorney in full



                                             MACQUARIE INFRASTRUCTURE ASSETS,
                                             LLC

                                             By: /s/ Peter Stokes
                                                 -----------------
                                                 Name:  Peter Stokes
                                                 Title: Chief Executive Officer


                                                                     EXHIBIT 2.6

                                                                  EXECUTION COPY

                           --------------------------

           FIRST AMENDMENT TO THE STAPLED SECURITY PURCHASE AGREEMENT

                           --------------------------

                                     Between

                   MACQUARIE INVESTMENTS AUSTRALIA PTY LIMITED
                (formerly Macquarie Technology Group Pty Limited)

                                       and

                        COMMUNICATIONS INFRASTRUCTURE LLC

                                      and

                             MACQUARIE BANK LIMITED

                          DATED AS OF NOVEMBER 18, 2004



            FIRST AMENDMENT TO THE STAPLED SECURITY PURCHASE AGREEMENT (this
"Amendment"), dated as of November 18, 2004, between MACQUARIE INVESTMENTS
AUSTRALIA PTY LIMITED ( formerly MACQUARIE TECHNOLOGY GROUP PTY LIMITED, ( ACN
069 416 977) an Australian Capital Territory company (the "Seller"),
COMMUNICATIONS INFRASTRUCTURE LLC, a Delaware limited liability corporation (the
"Purchaser") and MACQUARIE BANK LIMITED (ACN 008 583 542) an Australian Capital
Territory company.

            WHEREAS, on June 7, 2004, Macquarie Bank Limited and Macquarie
Infrastructure Company LLC (formerly Macquarie Infrastructure Assets LLC )
entered into a Stapled Security Purchase Agreement (the "Stapled Security
Purchase Agreement");

            WHEREAS, on September 15, 2004, Macquarie Bank Limited assigned all
of its rights and obligations in and to the Stapled Security Purchase Agreement
to the Seller pursuant to an Assignment Agreement and Consent to Assignment (the
"MBL Agreement");

            WHEREAS, on November 1, 2004, Macquarie Infrastructure Company LLC
assigned all of its rights and obligations in and to the Stapled Security
Purchase Agreement to Communications Infrastructure LLC pursuant to an
Assignment Agreement and Consent to Assignment;

            WHEREAS, pursuant to the Stapled Security Purchase Agreement, the
Seller has agreed to sell, and the Purchaser has agreed to purchase, a certain
number, to be determined pursuant to Section 2.02 of the Stapled Security
Purchase Agreement, of Stapled Securities (the "Shares") of Macquarie
Communications Infrastructure Group, comprising a public company and a
registered managed investment scheme listed on the Australian Stock Exchange
("MCG"); and

            WHEREAS, MCG announced on October 22, 2004, that it has submitted a
non-binding indicative offer (the Bid") to acquire (the "Proposed Transaction")
the U.K. broadcast transmission infrastructure owned by NTL Broadcast (the
"Proposed Seller"); and

            WHEREAS, pursuant to Section 9.07 of the Stapled Security Purchase
Agreement, the Seller and the Purchaser wish to amend the Stapled Security
Purchase Agreement to the extent provided herein.

            WHEREAS, the Seller, the Purchaser and Macquarie Bank Limited wish
to amend Section 7 of the MBL Agreement to the extent provided herein.

            NOW, THEREFORE, in consideration of the promises and the mutual
agreements and covenants hereinafter set forth, and for other good and valuable
consideration, the adequacy of which is hereby acknowledged, and intending to be
legally bound, the Seller and the Purchaser hereby agree as follows:

MCG First Amendment to the Stapled
Security Purchase Agreement

                                       1



            Section 1. Certain Defined Terms

            For purposes of this Amendment, all terms not otherwise defined
herein shall have the respective meanings provided in the Stapled Security
Purchase Agreement.

            The definition of Closing Date in Section 1.01 of the Stapled
      Security Purchase Agreement is hereby amended as follows:

            "Closing Date" means, with respect to the Initial Closing (as
      defined below), a date that is on or prior to the fifth Business Day
      following the IPO Closing Date, as agreed by the Purchaser and the Seller
      and, with respect to the Subsequent Closing, if any, a date that is on or
      prior to the fifth Business Day following the Revised Pricing Date, as
      agreed by the Purchaser and the Seller, or in either case such other date
      as is agreed between the parties.

            The definition of Share Cap in Section 1.01 of the Stapled Security
      Purchase Agreement is hereby amended as follows:

            "Share Cap" means the number of Stapled Securities, which
      constitutes 17.5% of the number of Stapled Securities on issue on the date
      of the Initial Closing, rounded down to the nearest integer."

            The definition of VWAP in Section 1.01 of the Stapled Security
      Purchase Agreement is hereby amended as follows:

            "VWAP" means the volume weighted average price of the Stapled
      Securities over the VWAP Calculation Period which can be calculated by
      adding the price (in Australian dollars) of each Stapled Security traded
      over the VWAP Calculation Period divided by the number of Stapled
      Securities traded over the same period of time; provided that, in
      determining the Pricing Date Share Amount (as defined below), in the event
      that the VWAP reflects (or partially reflects) a value per Stapled
      Security which has been or will be received by a holder of the Stapled
      Securities as a result of its holding of Stapled Securities from the
      beginning of the VWAP Calculation Period to the Pricing Date (whether by
      way of receipt of any capital or income distribution, rights or
      entitlements or otherwise but excluding any stock split or similar
      non-cash recapitalization affecting all shares equally or any general
      fluctuation in share price) but which would have been received by the
      other party to this Agreement if the Initial Closing had occurred
      immediately prior to the VWAP Calculation Period, the VWAP that is used
      shall be adjusted to remove such value (for example, by subtracting from
      any "cum" distribution or "cum" rights or entitlements prices which are
      taken into account in calculating such VWAP, the value of the relevant
      distribution, rights or entitlements that accrued to or were received by
      that particular holder); provided further that in the event that this
      proviso applies, the adjusted VWAP as of the Pricing Date and the Pricing
      Date Share Amount shall be calculated in the same

MCG First Amendment to the Stapled
Security Purchase Agreement

                                       2



      manner as the Revised VWAP and the Revised Share Amount pursuant to
      Section 2.02(b)(iii).

            Section 2. Purchase And Sale

            Section 2.02 of the Stapled Security Purchase Agreement is hereby
amended in its entirety as follows:

            "Shares.

            (a) Subject to clause 2.02(b), the number of Stapled Securities
      constituting the Shares to be sold and purchased under this Agreement
      shall be calculated by dividing the AUD Purchase Price by the VWAP
      determined as of the Pricing Date, rounded down to the nearest integer
      (the "Pricing Date Share Amount"); provided that the aggregate number of
      Shares shall not exceed the Share Cap.

            (b) Proposed Transaction Adjustment.

                  (i) In the event that neither MCG nor the Proposed Seller has
      publicly announced the results of the Bid in connection with the Proposed
      Transaction at least ten Trading Days prior to the IPO Pricing Date, then
      the number of Shares purchased pursuant to Section 2.02(a) of this
      Agreement shall be adjusted, upwards or downwards, as the case may be, to
      reflect the difference (the "Net Shares") between (1) the Pricing Date
      Share Amount and (2) the number of Stapled Securities calculated by
      dividing the AUD Purchase Price by the VWAP (as adjusted pursuant to
      Section 2.02(b)(ii), the "Revised VWAP") determined as of the date (the
      "Revised Pricing Date") that is 12 Trading Days after the date of the
      public announcement of the results of the Bid by either MCG or the
      Proposed Seller, as adjusted for any stock split or similar non-cash
      recapitalization affecting all shares equally, rounded down to the nearest
      integer (the "Revised Share Amount"); provided, that the Revised Share
      Amount shall not exceed the Share Cap.

                  (ii) In determining the Revised Share Amount, the Revised VWAP
      that is used shall be adjusted to reflect any change in the value of a
      Stapled Security which has been or will be received by a holder of the
      Stapled Securities as a result of its holding of Stapled Securities on and
      from the Initial Closing (whether by way of receipt of any capital or
      income distribution, rights or entitlements or otherwise but excluding any
      stock split or similar non-cash recapitalization affecting all shares
      equally or any general fluctuation in share price) but which should have
      been received by the other party to this Agreement if the adjustment
      pursuant to this Section 2.02(b) had occurred on the Initial Closing and
      which may not be reflected (or fully reflected) in the unadjusted Revised
      VWAP (for example, by adding back into any "ex" distribution or "ex"
      rights or entitlements prices which are taken into account in calculating
      such Revised VWAP, the value of the relevant distribution, rights or
      entitlements that accrued to or were received by that particular holder).

                  (iii) Macquarie Bank Limited shall procure that Macquarie
      Equity Capital Markets Limited calculates the Revised Share Amount and
      provides each of the Purchaser and the Seller with detailed information on
      the Revised VWAP including

MCG First Amendment to the Stapled
Security Purchase Agreement

                                       3



      without limitation, the details of adjustments it has made to reflect the
      preceding paragraph. In the event that the Purchaser and Seller disagree
      about the amount of the Revised VWAP then they must refer the calculation
      of the Revised VWAP together with the information provided by Macquarie
      Equity Capital Markets Limited to another investment bank which conducts
      an equity capital markets business in Australia approved by both the
      Seller and the Purchaser. That nominated investment bank will be asked to
      determine the Revised VWAP and to provide detailed information on the
      Revised VWAP including without limitation, the details of adjustments made
      to reflect the preceding paragraph and in the event its determination is
      different from the determination made by Macquarie Equity Capital Markets
      Limited, the basis for such difference. In the event the Purchaser and the
      Seller do not then agree on the Revised VWAP, the parties will adopt a
      Revised VWAP which is the average of the amount nominated by Macquarie
      Equity Capital Markets Limited and the nominated investment bank and the
      Revised Share Amount shall then be determined using this Revised VWAP.

                  (iv) In the event that the Revised Share Amount is greater
      than the Pricing Date Share Amount, (1) the Seller shall (A) assign,
      transfer, convey and deliver, free and clear of all Encumbrances, to the
      Purchaser, at no further cost to the Purchaser, the Net Shares; provided
      that, if the Revised Share Amount exceeds the Share Cap the Seller shall
      (x) assign, transfer, convey and deliver, free and clear of all
      Encumbrances, to the Purchaser, at no further cost to the Purchaser, the
      number of Stapled Securities equal to the difference between the Share Cap
      and the Pricing Date Share Amount and (y) pay to the Purchaser an amount
      in US dollars (converted using the rate of exchange on the Pricing Date
      which is the spot rate (at 12:00 noon EST) for the sale of Australian
      dollars against the purchase of US dollars, in the major banks located in
      New York City, determined if available, from a quotation of the Federal
      Reserve Bank of New York) calculated as of the last day of the VWAP
      Calculation Period for the Revised VWAP equal to the product of (a) the
      difference between the Revised Share Amount and the Share Cap and (b) the
      Revised VWAP, which amount shall be an adjustment to the Purchase Price
      and (B) if the Revised VWAP has been adjusted upwards pursuant Section
      2.02(b)(ii), pay to the Purchaser an amount in cash (less any applicable
      withholding tax) representing the amount of such adjustment multiplied by
      the number of Net Shares (or such lesser number of Stapled Securities as
      are actually transferred on the Subsequent Closing); and (2) if the
      Revised VWAP has been adjusted downwards pursuant Section 2.02(b)(ii), the
      Purchaser shall pay to the Seller an amount in cash (less any applicable
      withholding tax) representing the amount of such adjustment multiplied by
      the number of Net Shares (or such lesser number of Stapled Securities as
      are actually transferred on the Subsequent Closing).

                  (v) In the event that the Revised Share Amount is less than
      the Pricing Date Share Amount, (1) the Purchaser shall (A) assign,
      transfer, convey and deliver, free and clear of all Encumbrances, to the
      Seller, at no further cost to the Seller, the Net Shares and (B) if the
      Revised VWAP has been adjusted upwards pursuant Section 2.02(b)(ii), pay
      to the Seller an amount in cash (less any applicable withholding tax)
      representing the amount of such adjustment multiplied by the number of Net
      Shares; and (2) if the Revised VWAP has been adjusted downwards pursuant
      Section 2.02(b)(ii), the Seller shall pay to the Purchaser an amount in
      cash (less any applicable withholding tax) representing the amount of such
      adjustment multiplied by the number of Net Shares.

MCG First Amendment to the Stapled
Security Purchase Agreement

                                       4



                  (vi) Notwithstanding anything in this Section 2.02, if neither
      the Proposed Seller nor MCG has announced the results of the Bid prior to
      the date that is 30 calendar days after the Pricing Date, then the number
      of Shares to be sold and purchased pursuant to Section 2.02(a) of this
      Agreement shall not be adjusted.

                  (vii) Each party hereto agrees (1) to treat the Revised Share
      Amount (or the Share Cap, if applicable) as owned by the Purchaser
      immediately following the Initial Closing and to treat all Stapled
      Securities owned by the Seller prior to the Initial Closing (excluding the
      Revised Share Amount or the Share Cap, as applicable) as owned by the
      Seller immediately following the Initial Closing for U.S. federal income
      tax purposes, including, without limitation, for purposes of taking into
      account any dividends or distributions on any such Stapled Securities
      subject to this Agreement, and (2) to take all actions consistent with
      such treatment.

                  (viii) Payments of any cash adjustments under this Section
      2.02 are to be made in Australian dollars except as specified above.

                  (ix) Upon the occurrence of any event that is not contemplated
      by this Agreement which distorts the value of this Agreement to the
      disadvantage of one party, the parties hereto will consult in good faith
      to adjust the VWAP and/or the number of shares accordingly."

            Section 3. Closing

            Section 2.03 of the Stapled Security Purchase Agreement is hereby
amended by replacing the word "Buyer" with "Seller".

            Section 2.04 of the Stapled Security Purchase Agreement is hereby
amended in its entirety as follows:

            "(a) Subject to the terms and conditions of this Agreement, the sale
      and purchase of the Shares contemplated by this Agreement shall take place
      at a closing (the "Initial Closing") to be held at the offices of Shearman
      & Sterling LLP, 599 Lexington Avenue, New York, New York at 10:00 A.M. New
      York time on the Closing Date for the Initial Closing.

            (b) In the event that the number of shares to be purchased pursuant
      to this agreement is adjusted as contemplated in Section 2.02, the
      transfer of the shares and any other amounts as contemplated thereby shall
      take place at a closing (the "Subsequent Closing" and, together with the
      Initial Closing, the "Closing") to be held at the offices of Shearman &
      Sterling LLP, 599 Lexington Avenue, New York, New York at 10:00 A.M. New
      York time on the Closing Date for the Subsequent Closing; provided,
      however, that either party may defer payment of any amounts payable
      pursuant to Section 2.02(b)(iv)(l)(B), Section 2.02(b)(iv)(2) or Section
      2.02(b)(v) until a date promptly following receipt of amounts payable by
      MCG or a third party with respect to such Net Shares.

MCG First Amendment to the Stapled
Security Purchase Agreement

                                       5



            (c) In the event that either party is in possession of any material
      non-public information regarding MCG and its Subsidiaries at the time of
      the Subsequent Closing, the Subsequent Closing shall be deferred until
      neither party is in possession of material non-public information
      regarding MCG and its Subsidiaries for 12 consecutive Trading Days and the
      Revised VWAP shall be determined as of such 12th Trading Day for purposes
      of Section 2.02, with the corresponding adjustment to the Net Shares and
      the Revised Share Amount."

            Section 4. Closing Deliveries.

            Sections 2.05 and 2.06 of the Stapled Security Purchase Agreement
are hereby deleted and the existing Section 2.07 of the Stapled Security
Purchase Agreement is hereby amended in its entirety as follows:

            "SECTION 2.05. Closing Deliveries.

            (a) No later than one Business Day prior to the Closing Date, the
      party conveying Shares shall instruct a broker to do all things necessary
      to effect the transfer on the day following the Closing Date (Sydney time)
      of the Shares to the party receiving Shares;

            (b) At or prior to the Closing Date, the party conveying Shares
      shall execute all relevant documents, including share transfers, and do
      all other things, including giving directions, necessary to effect the
      transfer of the Shares to the other party hereto on the day (Sydney time)
      following Closing Date;

            (c) Two Business Days prior to the Closing Date, the party receiving
      Shares shall provide the other party hereto with the name and account
      details for the brokerage account into which the Shares are to be
      transferred upon Closing;

            (d) On the Closing Date, each party shall deliver to the other party
      such other documents and instruments reasonably requested by such other
      party to consummate the transactions contemplated hereby.

            (e) On the Closing Date of the Initial Closing, subject to the
      Purchaser complying with its obligations under this Section 2.05, the
      Seller shall deliver or cause to be delivered to the Purchaser a receipt
      for the Purchase Price.

            (f) On the Closing Date of the Initial Closing, the Purchaser shall
      deliver to the Seller the Purchase Price by wire transfer in immediately
      available funds to a bank account in the United States to be designated by
      the Seller in a written notice to the Purchaser at least five Business
      Days before the Initial Closing.

            (g) In the event of amounts payable pursuant to Section 2.02(b)(iv)
      or 2.02(b)(v), payment shall be made on the Closing Date of the Subsequent
      Closing (or such later date pursuant to Section 2.04(b)) by wire transfer
      in immediately available funds to a bank account in Australia to be
      designated by the recipient in a written notice to the other

MCG First Amendment to the Stapled
Security Purchase Agreement

                                       6



      party at least two Business Days before the date of payment and the
      recipient shall deliver to the other party a receipt for such amounts
      paid."

            Section 5. Conditions to Closing.

            Each of Section 7.01 and 7.02 of the Stapled Security Purchase
Agreement is hereby revised to insert the word "Initial" before the word
"Closing" in each instance where it appears.

            Section 6. Termination.

            Article VIII of the of the Stapled Security Purchase Agreement is
hereby amended in its entirety as follows:

            "(a) This Agreement may be terminated at any time prior to the
      Initial Closing:

                  (i)   by the Purchaser if, between the date hereof and the
                        Initial Closing: (1) an event or condition occurs that
                        has resulted in a Material Adverse Effect (other than
                        with respect to the Proposed Transaction), (2) any
                        representations and warranties of the Seller contained
                        in this Agreement shall not have been true and correct
                        when made, (3) the Seller shall not have complied in all
                        material respects with the covenants or agreements
                        contained in this Agreement to be complied with by it or
                        (4) the Seller makes a general assignment for the
                        benefit of creditors, or any proceeding shall be
                        instituted by or against the Seller seeking to
                        adjudicate it a bankrupt or insolvent, or seeking
                        liquidation, winding up or reorganization, arrangement,
                        adjustment, protection, relief or composition of its
                        debts under any Law relating to bankruptcy, insolvency
                        or reorganization;

                  (ii)  by the Seller if, between the date hereof and the
                        Initial Closing: (1) any representations and warranties
                        of the Purchaser contained in this Agreement shall not
                        have been true and correct when made, (2) the Purchaser
                        shall not have complied in all material respects with
                        the covenants or agreements contained in this Agreement
                        to be complied with by it or (3) the Purchaser makes a
                        general assignment for the benefit of creditors, or any
                        proceeding shall be instituted by or against the
                        Purchaser seeking to adjudicate it a bankrupt or
                        insolvent, or seeking liquidation, winding up or
                        reorganization, arrangement, adjustment, protection,
                        relief or composition of its debts under any Law
                        relating to bankruptcy, insolvency or reorganization;

                  (iii) by either the Seller or the Purchaser if the Initial
                        Closing shall not have occurred by March 31, 2005;
                        provided, however, that the right to terminate this
                        Agreement under this Section 8.01(a)(iii) shall not be
                        available to any party whose failure to fulfill any

MCG First Amendment to the Stapled
Security Purchase Agreement

                                       7



                        obligation under this Agreement shall have been the
                        cause of, or shall have resulted in, the failure of the
                        Initial Closing to occur on or prior to such date;

                  (iv)  by either the Purchaser or the Seller in the event that
                        any Governmental Authority (including the Foreign
                        Investment Review Board) shall have issued an order,
                        decree or ruling or taken any other action restraining,
                        enjoining or otherwise prohibiting the transactions
                        contemplated by this Agreement and such order, decree,
                        ruling or other action shall have become final and
                        nonappealable; or

                  (v)   by the Purchaser on the Printing Day if, in its
                        reasonable commercial judgment, the purchase of the
                        Shares, at an assumed price per Share equal to the VWAP
                        on the Printing Date, would be reasonably likely to have
                        an adverse effect on MIAT's ability to pay dividends as
                        contemplated by the preliminary prospectus in connection
                        with the IPO to be printed on the Printing Date.

            (b) This Agreement shall terminate automatically if either the
      Purchaser or the Seller possesses any material non-public information
      regarding MCG and its Subsidiaries (other than with respect to the
      Proposed Transaction) at any time between the Printing Date and the
      Closing Date for the Initial Closing."

            Section 7. MBL Agreement.

            In addition, the parties agree that Section 7 of the MBL Agreement
      is amended in its entirety as follows:

            "7. Covenants of Assignor and Purchaser. Notwithstanding any other
      provision of this Agreement to the contrary, each of the Assignor and the
      Purchaser shall notify the other in writing if, at any time during the
      period from the Business Day prior to the Printing Date to the earlier of
      Closing Date for the Subsequent Closing or, if the results of the Bid have
      not been announced, the expiration of the 30-day period referred to in
      Section 2.02(b)(vi) of the Assigned Agreement, it possesses any material
      non-public information regarding MCG and its Subsidiaries (other than with
      respect to the Proposed Transaction) and the other party shall be
      indemnified and held harmless by the Assignor or the Purchaser (in this
      clause "Indemnifier"), as the case may be, for any and all Losses arising
      out of a breach of this covenant by the Indemnifier to the same extent as
      would apply if this breach of covenant by the Indemnifier was a breach as
      provided for in Article VI of the Assigned Agreement."

            Section 8. General Provisions.

      (a) Governing Law. This Amendment shall be governed by, and construed in
accordance with, the laws of New South Wales, Australia.

MCG First Amendment to the Stapled
Security Purchase Agreement

                                       8



      (b) Counterparts. This Amendment may be executed and delivered (including
by facsimile transmission) in one or more counterparts, and by the different
parties hereto in separate counterparts, each of which when executed shall be
deemed to be an original, but all of which taken together shall constitute one
and the same agreement.

      (c) Entire Agreement. This Amendment constitutes the entire agreement of
the parties hereto with respect to the subject matter hereof and supersedes all
prior agreements and undertakings, both written and oral, between the Seller and
Purchaser with respect to the subject matter hereof. Each of the Stapled
Security Purchase Agreement and MBL Agreement shall continue in full force and
effect in accordance with its terms except as expressly provided herein or in
any subsequent written amendment executed by the Purchaser, the Seller and, with
respect to the MBL Agreement, Macquarie Bank Limited.

      (d) Severability. If any term or other provision of this Amendment is
invalid, illegal or incapable of being enforced by any Law or public policy, all
other terms and provisions of this Amendment shall nevertheless remain in full
force and effect so long as the economic or legal substance of the transactions
contemplated by this Amendment is not affected in any manner materially adverse
to any party. Upon such determination that any term or other provision is
invalid, illegal or incapable of being enforced, the parties hereto shall
negotiate in good faith to modify this Amendment so as to effect the original
intent of the parties as closely as possible in an acceptable manner in order
that the transactions contemplated by this Amendment are consummated as
originally contemplated to the greatest extent possible.

MCG First Amendment to the Stapled
Security Purchase Agreement

                                       9



            IN WITNESS WHEREOF, the Seller, the Purchaser and Macquarie Bank
Limited have caused this Agreement to be executed as of the date first written
above.

Signed on behalf of MACQUARIE
INVESTMENTS AUSTRALIA PTY LIMITED
by its attorneys in the presence of:

                                                          /s/ Grant Albert Smith
                                                          ----------------------
                                                          Signature of Attorney

                                                          Grant Albert Smith
                                                          ----------------------
                                                          Name of Attorney

/s/ Mark David Patterson                                  /s/ Philip Hall
- ------------------------                                  ----------------------
Signature of Witness                                      Signature of Attorney

Mark David Patterson                                      Philip Hall
- ------------------------                                  ----------------------
Name of Witness                                           Name of Attorney

MCG First Amendment to the Stapled
Security Purchase Agreement



Signed on behalf of MACQUARIE BANK
LIMITED by its attorneys in the presence of:

                                                          /s/ Grant Albert Smith
                                                          ----------------------
                                                          Signature of Attorney

                                                          Grant Albert Smith
                                                          ----------------------
                                                          Name of Attorney

/s/ Hilary Willoughby                                     /s/ Philip Hall
- ------------------------                                  ----------------------
Signature of Witness                                      Signature of Attorney

Hilary Willoughby                                         Philip Hall
- ------------------------                                  ----------------------
Name of Witness                                           Name of Attorney

MCG First Amendment to the Stapled
Security Purchase Agreement



                                              COMMUNICATIONS INFRASTRUCTURE LLC

                                              By: /s/ Peter Stokes
                                                  ------------------------------
                                                  Name: Peter Stokes
                                                  Title: Chief Executive Officer

MCG First Amendment to the Stapled
Security Purchase Agreement


                                                                     Exhibit 2.6


              ASSIGNMENT AGREEMENT AND CONSENT TO ASSIGNMENT (MIAL)


      ASSIGNMENT AGREEMENT (this "Assignment"), dated as of September 15, 2004,
between MACQUARIE BANK LIMITED, an Australian bank (the "Assignor") and
MACQUARIE TECHNOLOGY GROUP PTY LIMITED, a company organized under the laws of
the Australian Capital Territory (the "Assignee") and, solely for the purposes
of Section 7 of this Assignment, MACQUARIE INFRASTRUCTURE ASSETS LLC, a Delaware
Limited Liability Company ("MIAL"). Capitalized terms used but not defined
herein shall have the meanings assigned to such terms in the Assigned Agreement
(as defined below)

                                   WITNESSETH

            WHEREAS, Assignor is a party to the Stapled Security Purchase
Agreement, dated as of June 7, 2004, between Macquarie Bank Limited and
Macquarie Infrastructure Assets LLC (the "Assigned Agreement");

            WHEREAS, Assignor desires to assign all of its rights and
obligations in and to the Assigned Agreement to Assignee and Assignee desires to
accept such rights and assume such obligations of Assignor under the Assigned
Agreement.

            NOW, THEREFORE, in consideration of the promises and the mutual
agreements and covenants contained herein and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged,
Assignor and Assignee hereby agree as follows:

      1. Assignment. Assignor does hereby assign, transfer and set over to
Assignee, its successors and assigns, all of Assignor's rights, title and
interest and obligations in and to the Assigned Agreement, to have and to hold
the same unto Assignee, its successors and assigns, from and after the date
hereof (the "Effective Time") and for and during all of the remaining term
thereof, upon all of the terms, covenants, conditions and provisions therein
contained.

      2. Acceptance. Assignee accepts the foregoing assignment and Assignee
hereby assumes the performance of all of the terms, covenants, obligations and
conditions of the Assignor under the Assigned Agreement arising and accruing
from and after the Effective Time and Assignee agrees to well and truly perform
all of the terms, covenants, obligations and conditions of the Assigned
Agreement, all with the same full force and effect as if Assignee had originally
signed the Assigned Agreement.

      3. Notices. All notices and correspondence to Assignor under the Assigned
Agreement may be sent to:

             Macquarie Technology Group Pty Limited
             Level 9, 1 Martin Place
             Sydney NSW 2000
             AUSTRALIA
             Attn: Shemara Wikramanayake

      4. Counterparts. This Assignment may be executed in two or more
counterparts, each of

which shall be deemed an original, and all of which together shall constitute
one and the same instrument.

      5. Successors and Assigns. This Assignment shall inure to the benefit of
and be binding upon the parties hereto and their respective successors and
assigns.

      6. Representations or Warranties. The Assignor hereby represents and
warrants that the representations and warranties of the Seller (as defined in
the Assigned Agreement) in the Assigned Agreement were true and correct as of
the date of the Assigned Agreement and were true and correct immediately prior
to the consummation of the transactions contemplated by this Assignment. The
Assignee hereby represents and warrants that the representations and warranties
of the Seller, other than with respect to the due execution and delivery of the
Assigned Agreement by the Seller, in the Assigned Agreement were true and
correct upon the consummation of the transactions contemplated by this
Assignment. The Assignee hereby further represents and warrants that this
Assignment does not and will not (a) violate, conflict with or result in the
breach of any provision of the organizational documents of the Assignee; (b)
conflict with or violate any Law or Governmental Order applicable to the
Assignee or any of its respective assets, properties or businesses, which is
material in the context of the transactions contemplated hereby; or (c) conflict
in any material respect with, or result in any breach of, or constitute a
default under any agreement to which the Assignee is a party or by which it or
any of its assets or properties may be bound.

      7. Covenants of Assignor. Notwithstanding any other provision of this
Agreement to the contrary, the Assignor shall notify MIAL in writing immediately
if at any time during the period from the Business Day prior to the Printing
Date to the Closing Date it possesses any material non-public information
regarding MCG and its Subsidiaries, and MIAL shall be indemnified and held
harmless by Assignor for any and all Losses arising out of the breach of this
covenant to the same extent as provided in Article VI of the Assigned Agreement.
Assignor shall be deemed to possess all information possessed by any of its
Subsidiaries or employees involved in the management of MCG.

      8. Governing Law. This assignment and the rights and duties of the parties
hereunder shall be governed by, and construed in accordance with, the laws of
New South Wales, Australia.

      9. Submission to Jurisdiction. The parties hereby irrevocably and
unconditionally consent to submit to the non-exclusive jurisdiction of the
courts of New South Wales, Australia and the courts competent to determine
appeals from those courts, with respect to any actions, suits or proceedings,
which may be brought at any time, arising out of or relating to this Assignment
and the transactions contemplated hereby

      10. Further Assurances. Each party shall cooperate with the other, and
execute and deliver or use its best efforts to cause to be executed and
delivered, all such other instruments, including instruments of conveyance,
assignment and transfer, and take all such other actions as such party may
reasonably be requested to take by the other party hereto from time to time,
consistent with the terms of this Assignment, in order to effectuate the
provisions and purposes of this Assignment and the transactions contemplated
hereby.


                                       A-2

      IN WITNESS WHEREOF, Assignor and Assignee have caused this Assignment to
be executed as of the date first above written.

ASSIGNOR:

THE COMMON SEAL of                      )
Macquarie Bank Limited                  )
was hereunto affixed in accordance      )
with the Company's Constitution         )       /s/ Shemara Wikramanayake
                                             -----------------------------------
                                                      Director
                                             900/04

                                                /s/ Dennis Leong
                                             -----------------------------------
                                                         Director

            (MACQUARIE BANK LIMITED COMMON SEAL A.C.N. 008 583 542)


ASSIGNEE:

THE COMMON SEAL of                       )
Macquarie Technology Group Pty Limited   )
was hereunto affixed in accordance       )
with the Company's Constitution          )        /s/ Shemara Wikramanayake
                                             -----------------------------------
                                                         Director
                                             03/04

                                                     /s/ Dennis Leong
                                             -----------------------------------
                                                         Director

    (MACQUARIE TECHNOLOGY GROUP PTY LIMITED. COMMON SEAL A.C.N. 069 416 977)


FOR THE PURPOSES OF SECTION 7:

                                             MACQUARIE INFRASTRUCTURE ASSETS LLC

                                             By:    /s/ Peter Stokes
                                                 -------------------------------
                                             Name: Peter Stokes
                                             Title: Chief Executive Officer

The undersigned hereby consents to the foregoing Assignment and further
acknowledges and agrees that the Assigned Agreement is in full force and effect.

MACQUARIE INFRASTRUCTURE ASSETS LLC

By:  /s/ Peter Stokes
    -------------------------------
Name: Peter Stokes
Title: Chief Executive Officer


THE COMMON SEAL of                      )
MACQUARIE BANK LIMITED                  )
was hereunto affixed in accordance      )
with the Company's Constitution         )       /s/ Shemara Wikramanayake
                                             -----------------------------------
                                                         Director
                                             900/04

                                                /s/ Dennis Leong
                                             -----------------------------------
                                                         Director

            [MACQUARIE BANK LIMITED COMMON SEAL A.C.N. 008 583 542]


                                       A-2


                                                                     Exhibit 2.6


                 ASSIGNMENT AGREEMENT AND CONSENT TO ASSIGNMENT

      ASSIGNMENT AGREEMENT (this "Assignment"), dated as of November 1, 2004,
between MACQUARIE INFRASTRUCTURE COMPANY LLC (formerly Macquarie Infrastructure
Assets LLC), a Delaware limited liability company (the "Assignor") and
COMMUNICATIONS INFRASTRUCTURE LLC, a Delaware limited liability company (the
"Assignee").

                                   WITNESSETH

            WHEREAS, owns equity securities, comprising securities in two (or
more) separate entities that have to be traded as a single stapled security. In
MCG's case, stapled securities comprise a unit in an Australian trust (MCIT) and
a share in an Australian company (MCIL). MCG's stapled security holders have an
equal number of units in MCIT and shares in the MCIL.all of the issued and
outstanding shares of common stock, par value $0.01 per share (the "Common
Stock"), of North America Capital Holding Company, a Delaware corporation (the
"Company");

            WHEREAS, pursuant to the Stapled Security Purchase Agreement,
between Macquarie Technology Group Pty Limited, a company organized under the
laws of the Australian Capital Territory (as assignee of Macquarie Bank Limited)
("MTG") and the Assignor, dated as of June 7, 2004 (the "Stapled Security
Purchase Agreement"), the Assignor has agreed to purchase a certain number of
Stapled Securities (as defined in and determined in accordance with the Stapled
Security Purchase Agreement), pursuant to the terms and subject to the
conditions as set forth in the Stapled Security Purchase Agreement;

            WHEREAS, the Assignor desires to assign all of its rights and
obligations in and to the Stapled Security Purchase Agreement to the Assignee
and the Assignee desires to accept all such rights and assume all such
obligations of the Assignor under the Stapled Security Purchase Agreement;

            NOW, THEREFORE, in consideration of the promises and the mutual
agreements contained herein and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the Assignor and the
Assignee hereby agree as follows:

      1. Assignment. The Assignor does hereby assign, transfer, convey, grant,
deliver and set over to the Assignee, and its successors and assigns, all of
Assignor's rights, title and interest and obligations in and to the Stapled
Security Purchase Agreement, to have and to hold the same unto the Assignee, and
its successors and assigns, from and after the date hereof (the "Effective
Time") and for and during all of the remaining term thereof, upon all of the
terms, covenants, and conditions set forth therein.

      2. Acceptance. The Assignee accepts the foregoing assignment and the
Assignee hereby assumes the performance of all of the terms, covenants,
obligations and conditions of the Assignor under the Stapled Security Purchase
Agreement arising and accruing from and after the Effective Time and the
Assignee agrees to well and truly perform all of the terms, covenants,
obligations and satisfy the conditions of the Stapled Security Purchase
Agreement, all with the

same full force and effect as if the Assignee had executed the Stapled Security
Purchase Agreement.

      3. Notices. All notices and correspondence to the Assignor under the
Stapled Security Purchase Agreement may be sent to:

            Macquarie Infrastructure Company LLC
            600 5th Avenue
            New York, New York
            Telecopy: (212) 581-8037
            Attention: Peter Stokes

      4. Counterparts. This Assignment may be executed in two or more
counterparts, each of which shall be deemed an original, and all of which
together shall constitute one and the same instrument.

      5. Successors and Assigns. This Assignment shall inure to the benefit of
and be binding upon the parties hereto and their respective successors and
assigns.

      6. Representations or Warranties. The Assignor hereby represents and
warrants that the representations and warranties of the Assignor in the Stapled
Security Purchase Agreement were true and correct as of the date of the Stapled
Security Purchase Agreement and were true and correct immediately prior to the
consummation of the transactions contemplated by this Assignment. The Assignee
hereby represents and warrants that this Assignment does not and will not (a)
violate, conflict with or result in the breach of any provision of the
organizational documents of the Assignee; (b) conflict with or violate any
federal, national, supranational, state, provincial, local or similar statute,
law, ordinance, regulation, rule, code, order, requirement or rule of law
(including common law) ("Law") or any order, writ, judgment, injunction, decree,
stipulation, determination or award entered by or with any federal, national,
supranational, state, provincial, local or similar government, governmental,
regulatory or administrative authority, agency or commission or any court,
tribunal, or judicial or arbitral body ("Government Authority") applicable to
the Assignee or any of its respective assets, properties or businesses, which is
material in the context of the transactions contemplated hereby; or (c) conflict
in any material respect with, or result in any breach of, or constitute a
default under any agreement to which the Assignee is a party or by which it or
any of its assets or properties may be bound.

      7. Governing Law. This Agreement shall be governed by, and construed in
accordance with, the laws of New South Wales, Australia. Each party submits to
the non-exclusive jurisdiction of the courts of New South Wales, and the courts
competent to determine appeals from those courts, with respect to any
proceedings, which may be brought at any time relating to this Agreement.

      8. Further Assurances. Each party shall cooperate with the other, and
execute and deliver or use its best efforts to cause to be executed and
delivered, all such other instruments, including instruments of conveyance,
assignment and transfer, and take all such other actions as such party may
reasonably be requested to take by the other party hereto from time to time,


                                        2

consistent with the terms of this Assignment, in order to effectuate the
provisions and purposes of this Assignment and the transactions contemplated
hereby.

      10. Amendment. This Assignment may not be amended or modified except by an
instrument in writing signed by, or on behalf of the Assignor and by the
Assignee.

      11. No Third Party Beneficiaries. This Assignment shall be binding upon
and inure solely to the benefit of the Assignor and the Assignee and its
permitted assigns and nothing herein, express or implied, is intended to or
shall confer upon any other person, any legal or equitable right, benefit or
remedy of any nature whatsoever, under or by reason of this Assignment.

      12. Severability. If any term or other provision of this Assignment is
invalid, illegal or incapable of being enforced by any Law or public policy, all
other terms and provisions of this Assignment shall nevertheless remain in full
force and effect so long as the economic or legal substance of the transactions
contemplated hereby is not affected in any manner materially adverse to either
the Assignor or the Assignee. Upon such determination that any term or other
provision is invalid, illegal or incapable of being enforced, the parties hereto
shall negotiate in good faith to modify this Assignment so as to effect the
original intent of the parties as closely as possible in an acceptable manner in
order that the transactions contemplated by this Assignment are consummated as
originally contemplated to the greatest extent possible.

                            Signature Page to Follow


                                        3

      IN WITNESS WHEREOF, Assignor and Assignee have caused this Assignment to
be executed as of the date first above written.

                             ASSIGNOR:

                             MACQUARIE INFRASTRUCTURE COMPANY LLC

                             By:  /s/ Peter Stokes
                                 -------------------------------------
                             Name: Peter Stokes
                             Title: Chief Executive Officer

                             Assignee:

                             COMMUNICATIONS INFRASTRUCTURE LLC

                             By:  /s/ David M. Mitchell
                                 -------------------------------------
                             Name: David M. Mitchell
                             Title: Treasurer