Exhibit 99(b)

             Extract From Post-Effective Amendment No. 1 to Form S-4

                       THE COMPARATIVE SHAREHOLDER RIGHTS

       After  the  share   exchange,   BGE  common   shareholders   will  become
Constellation Energy common  shareholders,  and their rights will be governed by
Constellation  Energy's  charter  and  by-laws  rather  than BGE's  charter  and
by-laws. Constellation Energy's charter and by-laws differ from BGE's in certain
respects.  The differences in Constellation Energy's charter and by-laws reflect
the:  (1) removal of obsolete  and  unnecessary  provisions;  (2)  inclusion  of
provisions that provide  flexibility to operate in a competitive market; and (3)
inclusion of provisions that provide additional financing flexibility.  Approval
of the share  exchange  will also be  considered  approval and  ratification  of
Constellation  Energy's charter and by-laws. For more information,  please refer
to the forms of the charter and by-laws that are included as  appendices B and C
in Post-Effective Amendment No. 1 to Form S-4 (Registration No. 33-64799).

       The  table  below  compares  some  of the  rights  provided  to  BGE  and
Constellation  Energy  shareholders under their respective charters and by-laws,
under Securities and Exchange Commission (SEC) rules, and Maryland law:

 RIGHT                             BGE                   CONSTELLATION ENERGY
 -----                             ---                   --------------------

 Voting rights for        Superior voting rights      No superior voting rights
 preferred shareholders   (Four votes per share)      (One vote per share)

 Call of special meeting  Permitted by 25% of votes   Permitted by 25% of votes
                          entitled to be cast         entitled to be cast

Shareholder action by
written consent           Permitted                   Permitted

Removal of directors by   Permitted by majority vote  Permitted by majority vote
shareholders                                          for cause


Advance notice of         Proxy Proposals --          Proxy Proposals --
shareholder proposals     120 days                    120 days
                          Meeting Proposals --        Meeting Proposals --
                          45 days                     75 days

Charter amendments by     Permitted by two-thirds     Permitted by two-thirds
 common shareholders      vote                        vote(Board may provide
                                                      for lesser number)

By-law amendments by      Permitted by majority       Permitted by two-thirds
common shareholders       vote                        vote

       The  differences  between BGE's and  Constellation  Energy's  charter and
by-laws are summarized below:

AUTHORIZED SHARES

       BGE. BGE has authorized:
         o 175,000,000 shares of common stock,
         o 1,000,000 shares of preferred stock, and
         o 6,500,000 shares of preference stock.

       CONSTELLATION ENERGY. Constellation Energy has authorized:
         o 250,000,000 shares of common stock, and
         o 25,000,000 shares of preferred stock.

PREFERRED STOCK

       BGE. BGE's charter  authorizes both preferred and preference  stock.  The
charter specifies, among other things:

         o the number of votes per share (4 votes per share for  preferred and 1
         vote per share for preference),
         o matters preferred and preference shareholders may vote on,
         o a limit on the amount of dividends  that are payable on the preferred
         stock, and
         o certain  financial  tests that must be met before  the  preferred  or
         preference stock may be issued.

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       The charter  allows  BGE's Board of Directors to specify the other rights
       and terms of both types of stock,  such as redemption and  convertibility
       provisions.

       CONSTELLATION  ENERGY.  Constellation  Energy's  charter  authorizes only
       preferred  stock. It specifies that the preferred stock will have no more
       than one vote per  share,  as  determined  by the  Board.  The Board will
       determine the other terms of any preferred stock at the time of issuance.
       Constellation  Energy  will not  issue  preferred  stock  as a  defensive
       takeover mechanism without prior shareholder approval and will not afford
       preferred shareholders voting rights superior (including votes per share)
       to common shareholders.

VOTE REQUIRED TO PASS CERTAIN MATTERS

       BGE. The approval of two-thirds of all the votes entitled to be cast must
be received to approve charter amendments and certain extraordinary matters such
as mergers, share exchanges and the sale of substantially all of BGE's assets.

       CONSTELLATION  ENERGY.  The  approval  of  two-thirds  of all  the  votes
entitled to be cast must be received to approve  charter  amendments and certain
extraordinary  matters  such  as  mergers,  share  exchanges  and  the  sale  of
substantially  all of  Constellation  Energy's  assets.  However,  the Board may
authorize that such a matter be approved by a majority of all the votes entitled
to be cast.

REMOVAL OF DIRECTORS

       BGE. Under BGE's by-laws,  the  shareholders,  at any meeting duly called
and at which a quorum is  present,  may remove  any  director  from  office by a
majority vote.

       CONSTELLATION   ENERGY.   Under  Constellation   Energy's  charter,   the
shareholders,  at any meeting duly called and at which a quorum is present,  may
remove any director from office for cause by a majority vote.

AMENDING THE BY-LAWS

       BGE. BGE's by-laws may be amended or repealed,  and new by-laws  adopted,
by a majority vote of the Board of Directors or the common shareholders.

       CONSTELLATION  ENERGY.  Constellation  Energy's by-laws may be amended or
repealed,  and new by-laws  adopted by a majority vote of the Board of Directors
or by a two-thirds vote of the common shareholders.

ADVANCE NOTICE PROVISION

       BGE.  Neither  BGE's  charter  nor its by-laws  include a provision  with
respect to advance  notice of  shareholder  proposals  or director  nominations.
Under SEC rules,  shareholder proposals must be received at least 120 days prior
to the  anniversary of the date that the prior year's proxy statement was mailed
to shareholders in order to be considered for inclusion in the proxy  statement.
Other  proposals  sought to be  presented at the  shareholders'  meeting must be
received  at least 45 days prior to the  anniversary  of the date that the prior
year's proxy statement was mailed to shareholders.

       CONSTELLATION  ENERGY.  The SEC rule requiring 120 days advance notice of
shareholder  proposals  sought to be included in the proxy  statement  will also
apply  to  Constellation  Energy.  In  addition,  under  Constellation  Energy's
by-laws,  written notice of a proposal to be presented by any shareholder at the
shareholders'  meeting (including  nominations for director) must be received by
the Secretary of Constellation Energy at its principal executive office not less
than 75 days prior to the anniversary of the date the proxy statement was mailed
for the prior year's  annual  meeting (if the share  exchange is  approved,  the
anniversary  of the mail date for  Constellation  Energy's  first annual meeting
will be March 5, 2000). If the proposal is not timely received,  the shareholder
may not  present  it at the  annual  meeting.  See  "Submission  of  Shareholder
Proposals for Next Year" on page 38. The  additional 30 day time period has been
added to ensure  that  Constellation  Energy has  sufficient  time to inform all
shareholders,  in the proxy  statement,  of the matter sought to be presented at
the meeting.

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MARYLAND LAW

       Certain   provisions   of  Maryland  law  provide   enhanced   rights  to
shareholders,  including the right of holders of at least 25% of the outstanding
common stock to call a special meeting of  shareholders  for any purpose and the
right to take  action by way of  unanimous  written  consent  without  calling a
special meeting of shareholders.

       However,  certain other provisions of Maryland law may have the effect of
discouraging  persons from  acquiring  large blocks of a Maryland  corporation's
stock  and/or  delaying  or  preventing  a  change  of  control  of  a  Maryland
corporation. Under certain circumstances, these provisions could have the effect
of, among other things:

         o  reducing  or  eliminating   the  voting  power  of  a  20%  or  more
         shareholder,

         o  prohibiting  a 10% or more  shareholder  from engaging in a business
         combination  with a Maryland  corporation  for five years following the
         acquisition of the 10% stake (a "freezeout" provision), and

         o  requiring  a premium  payment  for  shares  purchased  in a two-step
         acquisition.

       Friendly mergers and other business combinations would not be affected by
these provisions.  However, a Maryland corporation may opt out of the provisions
by providing so in its charter or by-laws.  An amendment adopted for the purpose
of opting out of the  freeze-out  provision does not become  effective  until 18
months after its adoption.  Neither BGE nor Constellation  Energy have opted out
of the provisions.


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