EXHIBIT 99.A4



                           Exhibit 1.A.(8)(a)

      Participation Agreement Among MFS Variable Insurance Funds, Inc.,
            PFL Life and Massachusetts Financial Services Company




                            PARTICIPATION AGREEMENT

                                     AMONG

                         MFS VARIABLE INSURANCE TRUST,

                           PFL LIFE INSURANCE COMPANY

                                      AND

                    MASSACHUSETTS FINANCIAL SERVICES COMPANY

      THIS AGREEMENT, made and entered into this 24 day of November 1997, by and
among MFS VARIABLE INSURANCE TRUST, a Massachusetts business trust (the
"Trust"), PFL LIFE INSURANCE COMPANY, an IOWA STOCK LIFE INSURANCE COMPANY (the
"Company") on its own behalf and on behalf of each of the segregated asset
accounts of the Company set forth in Schedule A hereto, as may be amended from
time to time (the "Accounts"), and MASSACHUSETTS FINANCIAL SERVICES COMPANY, a
Delaware corporation ("MFS").

      WHEREAS, the Trust is registered as an open-end management investment
company under the Investment Company Act of 1940, as amended (the "1940 Act"),
and its shares are registered or will be registered under the Securities Act of
1933, as amended (the "1933 Act");

      WHEREAS, shares of beneficial interest of the Trust are divided into
several series of shares, each representing the interests in a particular
managed pool of securities and other assets;

      WHEREAS, the series of shares of the Trust offered by the Trust to the
Company and the Accounts are set forth on Schedule A attached hereto (each, a
"Portfolio," and, collectively, the "Portfolios");

      WHEREAS, MFS is duly registered as an investment adviser under the
Investment Advisers Act of 1940, as amended, and any applicable state securities
law, and is the Trust's investment adviser;

      WHEREAS, the Company will issue certain variable annuity and/or variable
life insurance contracts (individually, the "Policy" or, collectively, the
"Policies") which, if required by applicable law, will be registered under the
1933 Act;

      WHEREAS, the Accounts are duly organized, validly existing segregated
asset accounts, established by resolution of the Board of Directors of the
Company, to set aside and invest assets attributable to the aforesaid variable
annuity and/or variable life insurance contracts that are allocated to the
Accounts (the Policies and the Accounts covered by this Agreement, and each
corresponding Portfolio covered by this Agreement in which the Accounts invest,
is specified in Schedule A attached hereto as may be modified from time to
time);

      WHEREAS, the Company has registered or will register the Accounts as unit
investment trusts under the 1940 Act (unless exempt therefrom);

      WHEREAS, MFS Fund Distributors, Inc. (the "Underwriter") is registered as
a broker-dealer with the Securities and Exchange Commission (the "SEC") under
the Securities Exchange Act of 1934, as amended (hereinafter the "1934 Act"),
and is a member in good standing of the National Association of Securities
Dealers, Inc. (the "NASD");

      WHEREAS, AEGON USA SECURITIES, INC., the underwriter for the individual
variable annuity and the variable life policies, is registered as a
broker-dealer with the SEC under the 1934 Act and is a member in good standing
of the NASD; and



      WHEREAS, to the extent permitted by applicable insurance laws and
regulations, the Company intends to purchase shares in one or more of the
Portfolios specified in Schedule A attached hereto (the "Shares") on behalf of
the Accounts to fund the Policies, and the Trust intends to sell such Shares to
the Accounts at net asset value;

      NOW, THEREFORE, in consideration of their mutual promises, the Trust, MFS,
and the Company agree as follows:

ARTICLE I. SALE OF TRUST SHARES

      1.1. The Trust agrees to sell to the Company those Shares which the
      Accounts order (based on orders placed by Policy holders on that Business
      Day, as defined below) and which are available for purchase by such
      Accounts, executing such orders on a daily basis at the net asset value
      next computed after receipt by the Trust or its designee of the order for
      the Shares. For purposes of this Section 1.1, the Company shall be the
      designee of the Trust for receipt of such orders from Policy owners and
      receipt by such designee shall constitute receipt by the Trust; PROVIDED
      that the Trust receives notice of such orders by 9:30 a.m. New York time
      on the next following Business Day. "Business Day" shall mean any day on
      which the New York Stock Exchange, Inc. (the "NYSE") is open for trading
      and on which the Trust calculates its net asset value pursuant to the
      rules of the SEC.

      1.2. The Trust agrees to make the Shares available indefinitely for
      purchase at the applicable net asset value per share by the Company and
      the Accounts on those days on which the Trust calculates its net asset
      value pursuant to rules of the SEC and the Trust shall calculate such net
      asset value on each day which the NYSE is open for trading.
      Notwithstanding the foregoing, the Board of Trustees of the Trust (the
      "Board") may refuse to sell any Shares to the Company and the Accounts, or
      suspend or terminate the offering of the Shares if such action is required
      by law or by regulatory authorities having jurisdiction or is, in the sole
      discretion of the Board acting in good faith and in light of its fiduciary
      duties under federal and any applicable state laws, necessary in the best
      interest of the Shareholders of such Portfolio.

      1.3. The Trust and MFS agree that the Shares will be sold only to
      insurance companies which have entered into participation agreements with
      the Trust and MFS (the "Participating Insurance Companies") and their
      separate accounts, qualified pension and retirement plans and MFS or its
      affiliates. The Trust and MFS will not sell Trust shares to any insurance
      company or separate account unless an agreement containing provisions
      substantially the same as Articles III and VII of this Agreement is in
      effect to govern such sales. The Company will not resell the Shares except
      to the Trust or its agents.

      1.4. The Trust agrees to redeem for cash, on the Company's request, any
      full or fractional Shares held by the Accounts (based on orders placed by
      Policy owners on that Business Day), executing such requests on a daily
      basis at the net asset value next computed after receipt by the Trust or
      its designee of the request for redemption. For purposes of this Section
      1.4, the Company shall be the designee of the Trust for receipt of
      requests for redemption from Policy owners and receipt by such designee
      shall constitute receipt by the Trust; provided that the Trust receives
      notice of such request for redemption by 9:30 a.m. New York time on the
      next following Business Day.

      1.5. Each purchase, redemption and exchange order placed by the Company
      shall be placed separately for each Portfolio and shall not be netted with
      respect to any Portfolio. However, with respect to payment of the purchase
      price by the Company and of redemption proceeds by the Trust, the Company
      and the Trust shall net purchase and redemption orders with respect to
      each Portfolio and shall transmit one net payment for all of the
      Portfolios in accordance with Section 1.6 hereof.


                                      -2-



      1.6. In the event of net purchases, the Company shall pay for the Shares
      by 2:00 p.m. New York time on the next Business Day after an order to
      purchase the Shares is made in accordance with the provisions of Section
      1.1. hereof. In the event of net redemptions, the Trust shall pay the
      redemption proceeds by 2:00 p.m. New York time on the next Business Day
      after an order to redeem the shares is made in accordance with the
      provisions of Section 1.4. hereof. All such payments shall be in federal
      funds transmitted by wire.

      1.7. Issuance and transfer of the Shares will be by book entry only. Stock
      certificates will not be issued to the Company or the Accounts. The Shares
      ordered from the Trust will be recorded in an appropriate title for the
      Accounts or the appropriate subaccounts of the Accounts.

      1.8. The Trust shall furnish same day notice (by wire or telephone
      followed by written confirmation) to the Company of any dividends or
      capital gain distributions payable on the Shares. The Company hereby
      elects to receive all such dividends and distributions as are payable on a
      Portfolio's Shares in additional Shares of that Portfolio. The Trust shall
      notify the Company of the number of Shares so issued as payment of such
      dividends and distributions.

      1.9. The Trust or its custodian shall make the net asset value per share
      for each Portfolio available to the Company on each Business Day as soon
      as reasonably practical after the net asset value per share is calculated
      and shall use its best efforts to make such net asset value per share
      available by 6:30 p.m. New York time. In the event that the Trust is
      unable to meet the 6:30 p.m. time stated herein, it shall provide
      additional time for the Company to place orders for the purchase and
      redemption of Shares. Such additional time shall be equal to the
      additional time which the Trust takes to make the net asset value
      available to the Company. If the Trust provides materially incorrect share
      net asset value information, the Trust shall make an adjustment to the
      number of shares purchased or redeemed for the Accounts to reflect the
      correct net asset value per share. Any material error in the calculation
      or reporting of net asset value per share, dividend or capital gains
      information shall be reported promptly upon discovery to the Company.

ARTICLE II. CERTAIN REPRESENTATIONS, WARRANTIES AND COVENANTS

      2.1. The Company represents and warrants that the Policies are or will be
      registered under the 1933 Act or are exempt from or not subject to
      registration thereunder, and that the Policies will be issued, sold, and
      distributed in compliance in all material respects with all applicable
      state and federal laws, including without limitation the 1933 Act, the
      Securities Exchange Act of 1934, as amended (the "1934 Act"), and the 1940
      Act. The Company further represents and warrants that it is an insurance
      company duly organized and in good standing under applicable law and that
      it has legally and validly established the Account as a segregated asset
      account under applicable law and has registered or, prior to any issuance
      or sale of the Policies, will register the Accounts as unit investment
      trusts in accordance with the provisions of the 1940 Act (unless exempt
      therefrom) to serve as segregated investment accounts for the Policies,
      and that it will maintain such registration for so long as any Policies
      are outstanding. The Company shall amend the registration statements under
      the 1933 Act for the Policies and the registration statements under the
      1940 Act for the Accounts from time to time as required in order to effect
      the continuous offering of the Policies or as may otherwise be required by
      applicable law. The Company shall register and qualify the Policies for
      sales in accordance with the securities laws of the various states only if
      and to the extent deemed necessary by the Company.

      2.2. The Company represents and warrants that the Policies are currently
      and at the time of issuance will be treated as life insurance, endowment
      or annuity contracts under applicable provisions of the Internal Revenue
      Code of 1986, as amended (the "Code"), that it will maintain such
      treatment and that it will notify the Trust or MFS immediately upon having
      a reasonable basis for believing that the Policies have ceased to be so
      treated or that they might not be so treated in the future.


                                      -3-


      2.3. The Company represents and warrants that AEGON USA SECURITIES, INC.
      (and its assignees), the underwriter for the individual variable annuity
      and the variable life policies, is a member in good standing of the NASD
      and is a registered broker-dealer with the SEC. The Company represents and
      warrants that the Company and AEGON USA SECURITIES, INC. (and its
      assignees) will sell and distribute such policies in accordance in all
      material respects with all applicable state and federal securities laws,
      including without limitation the 1933 Act, the 1934 Act, and the 1940 Act.

      2.4. The Trust and MFS represent and warrant that the Shares sold pursuant
      to this Agreement shall be registered under the 1933 Act, duly authorized
      for issuance and sold in compliance with the laws of The Commonwealth of
      Massachusetts and all applicable federal and state securities laws and
      that the Trust is and shall remain registered under the 1940 Act. The
      Trust shall amend the registration statement for its Shares under the 1933
      Act and the 1940 Act from time to time as required in order to effect the
      continuous offering of its Shares. The Trust shall register and qualify
      the Shares for sale in accordance with the laws of the various states only
      if and to the extent deemed necessary by the Trust.

      2.5. MFS represents and warrants that the Underwriter is a member in good
      standing of the NASD and is registered as a broker-dealer with the SEC.
      The Trust and MFS represent that the Trust and the Underwriter will sell
      and distribute the Shares in accordance in all material respects with all
      applicable state and federal securities laws, including without limitation
      the 1933 Act, the 1934 Act, and the 1940 Act.

      2.6. The Trust represents that it is lawfully organized and validly
      existing under the laws of The Commonwealth of Massachusetts and that it
      does and will comply in all material respects with the 1940 Act and any
      applicable regulations thereunder.

      2.7. MFS represents and warrants that it is and shall remain duly
      registered under all applicable federal securities laws and that it shall
      perform its obligations for the Trust in compliance in all material
      respects with any applicable federal securities laws and with the
      securities laws of The Commonwealth of Massachusetts. MFS represents and
      warrants that it is not subject to state securities laws other than the
      securities laws of The Commonwealth of Massachusetts and that it is exempt
      from registration as an investment adviser under the securities laws of
      The Commonwealth of Massachusetts.

      2.8. No less frequently than annually, the Company shall submit to the
      Board such reports, material or data as the Board may reasonably request
      so that it may carry out fully the obligations imposed upon it by the
      conditions contained in the exemptive application pursuant to which the
      SEC has granted exemptive relief to permit mixed and shared funding (the
      "Mixed and Shared Funding Exemptive Order").

ARTICLE III. PROSPECTUS AND PROXY STATEMENTS; VOTING

      3.1. At least annually, the Trust or its designee shall provide the
      Company, free of charge, with as many copies of the current prospectus
      (describing only the Portfolios listed in Schedule A hereto) for the
      Shares as the Company may reasonably request for distribution to existing
      Policy owners whose Policies are funded by such Shares. The Trust or its
      designee shall provide the Company, at the Company's expense, with as many
      copies of the current prospectus for the Shares as the Company may
      reasonably request for distribution to prospective purchasers of Policies.
      If requested by the Company in lieu thereof, the Trust or its designee
      shall provide such documentation (including a "camera ready" copy of the
      new prospectus as set in type or, at the request of the Company, as a
      diskette in the form sent to the financial printer) and other assistance
      as is reasonably necessary in order for the parties hereto once each year
      (or more frequently if the prospectus for the Shares is supplemented or
      amended) to have the prospectus for the Policies and the prospectus for
      the Shares printed together in one document; the expenses of such printing
      to be apportioned between (a) the Company and (b) the Trust or its
      designee in proportion to the number of pages of the Policy and Shares'
      prospectuses, taking account of other relevant factors affecting the
      expense of printing, such as covers, columns, graphs and charts; the Trust
      or its designee to bear the cost of printing the Shares' prospectus


                                      -4-


      portion of such document for distribution to owners of existing Policies
      funded by the Shares and the Company to bear the expenses of printing the
      portion of such document relating to the Accounts; PROVIDED, however, that
      the Company shall bear all printing expenses of such combined documents
      where used for distribution to prospective purchasers or to owners of
      existing Policies not funded by the Shares. In the event that the Company
      requests that the Trust or its designee provides the Trust's prospectus in
      a "camera ready" or diskette format, the Trust shall be responsible for
      providing the prospectus in the format in which it or MFS is accustomed to
      formatting prospectuses and shall bear the expense of providing the
      prospectus in such format (E.G., typesetting expenses), and the Company
      shall bear the expense of adjusting or changing the format to conform with
      any of its prospectuses.

      3.2. The prospectus for the Shares shall state that the statement of
      additional information for the Shares is available from the Trust or its
      designee. The Trust or its designee, at its expense, shall print and
      provide such statement of additional information to the Company (or a
      master of such statement suitable for duplication by the Company) for
      distribution to any owner of a Policy funded by the Shares. The Trust or
      its designee, at the Company's expense, shall print and provide such
      statement to the Company (or a master of such statement suitable for
      duplication by the Company) for distribution to a prospective purchaser
      who requests such statement or to an owner of a Policy not funded by the
      Shares.

      3.3. The Trust or its designee shall provide the Company free of charge
      copies, if and to the extent applicable to the Shares, of the Trust's
      proxy materials, reports to Shareholders and other communications to
      Shareholders in such quantity as the Company shall reasonably require for
      distribution to Policy owners.

      3.4. Notwithstanding the provisions of Sections 3.1, 3.2, and 3.3 above,
      or of Article V below, the Company shall pay the expense of printing or
      providing documents to the extent such cost is considered a distribution
      expense. Distribution expenses would include by way of illustration, but
      are not limited to, the printing of the Shares' prospectus or prospectuses
      for distribution to prospective purchasers or to owners of existing
      Policies not funded by such Shares.

      3.5. The Trust hereby notifies the Company that it may be appropriate to
      include in the prospectus pursuant to which a Policy is offered disclosure
      regarding the potential risks of mixed and shared funding.

      3.6. If and to the extent required by law, the Company shall:

            (a)   solicit voting instructions from Policy owners;

            (b)   vote the Shares in accordance with instructions received from
                  Policy owners; and

            (c)   vote the Shares for which no instructions have been received
                  in the same proportion as the Shares of such Portfolio for
                  which instructions have been received from Policy owners;

      so long as and to the extent that the SEC continues to interpret the 1940
      Act to require pass through voting privileges for variable contract
      owners. The Company will in no way recommend action in connection with or
      oppose or interfere with the solicitation of proxies for the Shares held
      for such Policy owners. The Company reserves the right to vote shares held
      in any segregated asset account in its own right, to the extent permitted
      by law. Participating Insurance Companies shall be responsible for
      assuring that each of their separate accounts holding Shares calculates
      voting privileges in the manner required by the Mixed and Shared Funding
      Exemptive Order. The Trust and MFS will notify the Company of any changes
      of interpretations or amendments to the Mixed and Shared Funding Exemptive
      Order.


                                      -5-



ARTICLE IV. SALES MATERIAL AND INFORMATION

      4.1. The Company shall furnish, or shall cause to be furnished, to the
      Trust or its designee, each piece of sales literature or other promotional
      material in which the Trust, MFS, any other investment adviser to the
      Trust, or any affiliate of MFS are named, at least three (3) Business Days
      prior to its use. No such material shall be used if the Trust, MFS, or
      their respective designees reasonably objects to such use within three (3)
      Business Days after receipt of such material.

      4.2. The Company shall not give any information or make any
      representations or statement on behalf of the Trust, MFS, any other
      investment adviser to the Trust, or any affiliate of MFS or concerning the
      Trust or any other such entity in connection with the sale of the Policies
      other than the information or representations contained in the
      registration statement, prospectus or statement of additional information
      for the Shares, as such registration statement, prospectus and statement
      of additional information may be amended or supplemented from time to
      time, or in reports or proxy statements for the Trust, or in sales
      literature or other promotional material approved by the Trust, MFS or
      their respective designees, except with the permission of the Trust, MFS
      or their respective designees. The Trust, MFS or their respective
      designees each agrees to respond to any request for approval on a prompt
      and timely basis. The Company shall adopt and implement procedures
      reasonably designed to ensure that information concerning the Trust, MFS
      or any of their affiliates which is intended for use only by brokers or
      agents selling the Policies (I.E., information that is not intended for
      distribution to Policy owners or prospective Policy owners) is so used,
      and neither the Trust, MFS nor any of their affiliates shall be liable for
      any losses, damages or expenses relating to the improper use of such
      broker only materials.

      4.3. The Trust or its designee shall furnish, or shall cause to be
      furnished, to the Company or its designee, each piece of sales literature
      or other promotional material in which the Company and/or the Accounts is
      named, at least three (3) Business Days prior to its use. No such material
      shall be used if the Company or its designee reasonably objects to such
      use within three (3) Business Days after receipt of such material.

      4.4. The Trust and MFS shall not give, and agree that the Underwriter
      shall not give, any information or make any representations on behalf of
      the Company or concerning the Company, the Accounts, or the Policies in
      connection with the sale of the Policies other than the information or
      representations contained in a registration statement, prospectus, or
      statement of additional information for the Policies, as such registration
      statement, prospectus and statement of additional information may be
      amended or supplemented from time to time, or in reports for the Accounts,
      or in sales literature or other promotional material approved by the
      Company or its designee, except with the permission of the Company. The
      Company or its designee agrees to respond to any request for approval on a
      prompt and timely basis. The parties hereto agree that this Section 4.4.
      is neither intended to designate nor otherwise imply that MFS is an
      underwriter or distributor of the Policies.

      4.5. The Company and the Trust (or its designee in lieu of the Company or
      the Trust, as appropriate) will each provide to the other at least one
      complete copy of all registration statements, prospectuses, statements of
      additional information, reports, proxy statements, sales literature and
      other promotional materials, applications for exemptions, requests for
      no-action letters, and all amendments to any of the above, that relate to
      the Policies, or to the Trust or its Shares, prior to or contemporaneously
      with the filing of such document with the SEC or other regulatory
      authorities. The Company and the Trust shall also each promptly inform the
      other of the results of any examination by the SEC (or other regulatory
      authorities) that relates to the Policies, the Trust or its Shares, and
      the party that was the subject of the examination shall provide the other
      party with a copy of relevant portions of any "deficiency letter" or other
      correspondence or written report regarding any such examination.


                                      -6-


      4.6. The Trust and MFS will provide the Company with as much notice as is
      reasonably practicable of any proxy solicitation for any Portfolio, and of
      any material change in the Trust's registration statement, particularly
      any change resulting in change to the registration statement or prospectus
      or statement of additional information for any Account. The Trust and MFS
      will cooperate with the Company so as to enable the Company to solicit
      proxies from Policy owners or to make changes to its prospectus, statement
      of additional information or registration statement, in an orderly manner.
      The Trust and MFS will make reasonable efforts to attempt to have changes
      affecting Policy prospectuses become effective simultaneously with the
      annual updates for such prospectuses.

      4.7. For purpose of this Article IV and Article VIII, the phrase "sales
      literature or other promotional material" includes but is not limited to
      advertisements (such as material published, or designed for use in, a
      newspaper, magazine, or other periodical, radio, television, telephone or
      tape recording, videotape display, signs or billboards, motion pictures,
      or other public media), and sales literature (such as brochures,
      circulars, reprints or excerpts or any other advertisement, sales
      literature, or published articles), distributed or made generally
      available to customers or the public, educational or training materials or
      communications distributed or made generally available to some or all
      agents or employees.

ARTICLE V. FEES AND EXPENSES

      5.1. The Trust shall pay no fee or other compensation to the Company under
      this Agreement, and the Company shall pay no fee or other compensation to
      the Trust, except that if the Trust or any Portfolio adopts and implements
      a plan pursuant to Rule 12b-1 under the 1940 Act to finance distribution
      and Shareholder servicing expenses, then, subject to obtaining any
      required exemptive orders or regulatory approvals, the Trust may make
      payments to the Company or to the underwriter for the Policies if and in
      amounts agreed to by the Trust in writing. Each party, however, shall, in
      accordance with the allocation of expenses specified in Articles III and V
      hereof, reimburse other parties for expenses initially paid by one party
      but allocated to another party. In addition, nothing herein shall prevent
      the parties hereto from otherwise agreeing to perform, and arranging for
      appropriate compensation for, other services relating to the Trust and/or
      to the Accounts.

      5.2. The Trust or its designee shall bear the expenses for the cost of
      registration and qualification of the Shares under all applicable federal
      and state laws, including preparation and filing of the Trust's
      registration statement, and payment of filing fees and registration fees;
      preparation and filing of the Trust's proxy materials and reports to
      Shareholders; setting in type and printing its prospectus and statement of
      additional information (to the extent provided by and as determined in
      accordance with Article III above); setting in type and printing the proxy
      materials and reports to Shareholders (to the extent provided by and as
      determined in accordance with Article III above); the preparation of all
      statements and notices required of the Trust by any federal or state law
      with respect to its Shares; all taxes on the issuance or transfer of the
      Shares; and the costs of distributing the Trust's prospectuses and proxy
      materials to owners of Policies funded by the Shares and any expenses
      permitted to be paid or assumed by the Trust pursuant to a plan, if any,
      under Rule 12b-1 under the 1940 Act. The Trust shall not bear any expenses
      of marketing the Policies.

      5.3. The Company shall bear the expenses of distributing the Shares'
      prospectus or prospectuses in connection with new sales of the Policies
      and of distributing the Trust's Shareholder reports to Policy owners. The
      Company shall bear all expenses associated with the registration,
      qualification, and filing of the Policies under applicable federal
      securities and state insurance laws; the cost of preparing, printing and
      distributing the Policy prospectus and statement of additional
      information; and the cost of preparing, printing and distributing annual
      individual account statements for Policy owners as required by state
      insurance laws.

      5.4. MFS will quarterly reimburse the Company certain of the
      administrative costs and expenses incurred by the Company as a result of
      operations necessitated by the beneficial ownership by Policy owners of
      shares of the Portfolios of the Trust, equal to 0.20% per annum of the
      aggregate net assets of the Trust attributable to such Policy owners. In
      no event shall such fee be paid by the Trust, its shareholders or by the
      Policy holders.


                                      -7-


ARTICLE VI. DIVERSIFICATION AND RELATED LIMITATIONS

      6.1. The Trust and MFS represent and warrant that each Portfolio of the
      Trust will meet the diversification requirements of Section 817 (h) (1) of
      the Code and Treas. Reg. 1.817-5, relating to the diversification
      requirements for variable annuity, endowment, or life insurance contracts,
      as they may be amended from time to time (and any revenue rulings, revenue
      procedures, notices, and other published announcements of the Internal
      Revenue Service interpreting these sections), as if those requirements
      applied directly to each such Portfolio.

      6.2. The Trust and MFS represent that each Portfolio will elect to be
      qualified as a Regulated Investment Company under Subchapter M of the Code
      and that they will maintain such qualification (under Subchapter M or any
      successor or similar provision).

ARTICLE VII. POTENTIAL MATERIAL CONFLICTS

      7.1. The Trust agrees that the Board, constituted with a majority of
      disinterested trustees, will monitor each Portfolio of the Trust for the
      existence of any material irreconcilable conflict between the interests of
      the variable annuity contract owners and the variable life insurance
      policy owners of the Company and/or affiliated companies ("contract
      owners") investing in the Trust. The Board shall have the sole authority
      to determine if a material irreconcilable conflict exists, and such
      determination shall be binding on the Company only if approved in the form
      of a resolution by a majority of the Board, or a majority of the
      disinterested trustees of the Board. The Board will give prompt notice of
      any such determination to the Company.

      7.2. The Company agrees that it will be responsible for assisting the
      Board in carrying out its responsibilities under the conditions set forth
      in the Trust's exemptive application pursuant to which the SEC has granted
      the Mixed and Shared Funding Exemptive Order by providing the Board, as it
      may reasonably request, with all information necessary for the Board to
      consider any issues raised and agrees that it will be responsible for
      promptly reporting any potential or existing conflicts of which it is
      aware to the Board including, but not limited to, an obligation by the
      Company to inform the Board whenever contract owner voting instructions
      are disregarded. The Company also agrees that, if a material
      irreconcilable conflict arises, it will at its own cost remedy such
      conflict up to and including (a) withdrawing the assets allocable to some
      or all of the Accounts from the Trust or any Portfolio and reinvesting
      such assets in a different investment medium, including (but not limited
      to) another Portfolio of the Trust, or submitting to a vote of all
      affected contract owners whether to withdraw assets from the Trust or any
      Portfolio and reinvesting such assets in a different investment medium
      and, as appropriate, segregating the assets attributable to any
      appropriate group of contract owners that votes in favor of such
      segregation, or offering to any of the affected contract owners the option
      of segregating the assets attributable to their contracts or policies, and
      (b) establishing a new registered management investment company and
      segregating the assets underlying the Policies, unless a majority of
      Policy owners materially adversely affected by the conflict have voted to
      decline the offer to establish a new registered management investment
      company.

      7.3. A majority of the disinterested trustees of the Board shall determine
      whether any proposed action by the Company adequately remedies any
      material irreconcilable conflict. In the event that the Board determines
      that any proposed action does not adequately remedy any material
      irreconcilable conflict, the Company will withdraw from investment in the
      Trust each of the Accounts designated by the disinterested trustees and
      terminate this Agreement within six (6) months after the Board informs the
      Company in writing of the foregoing determination; PROVIDED, HOWEVER, that
      such withdrawal and termination shall be limited to the extent required to
      remedy any such material irreconcilable conflict as determined by a
      majority of the disinterested trustees of the Board.


                                      -8-


      7.4. If and to the extent that Rule 6e-2 and Rule 6e-3(T) are amended, or
      Rule 6e-3 is adopted, to provide exemptive relief from any provision of
      the 1940 Act or the rules promulgated thereunder with respect to mixed or
      shared funding (as defined in the Mixed and Shared Funding Exemptive
      Order) on terms and conditions materially different from those contained
      in the Mixed and Shared Funding Exemptive Order, then (a) the Trust and/or
      the Participating Insurance Companies, as appropriate, shall take such
      steps as may be necessary to comply with Rule 6e-2 and 6e-3(T), as
      amended, and Rule 6e-3, as adopted, to the extent such rules are
      applicable; and (b) Sections 3.5, 3.6, 7.1, 7.2, 7.3 and 7.4 of this
      Agreement shall continue in effect only to the extent that terms and
      conditions substantially identical to such Sections are contained in such
      Rule(s) as so amended or adopted.

ARTICLE VIII. INDEMNIFICATION

      8.1.  INDEMNIFICATION BY THE COMPANY 

            The Company agrees to indemnify and hold harmless the Trust, MFS,
      any affiliates of MFS, and each of their respective directors/trustees,
      officers and each person, if any, who controls the Trust or MFS within the
      meaning of Section 15 of the 1933 Act, and any agents or employees of the
      foregoing (each an "Indemnified Party," or collectively, the "Indemnified
      Parties" for purposes of this Section 8.1) against any and all losses,
      claims, damages, liabilities (including amounts paid in settlement with
      the written consent of the Company) or expenses (including reasonable
      counsel fees) to which any Indemnified Party may become subject under any
      statute, regulation, at common law or otherwise, insofar as such losses,
      claims, damages, liabilities or expenses (or actions in respect thereof)
      or settlements are related to the sale or acquisition of the Shares or the
      Policies and:

            (a)   arise out of or are based upon any untrue statement or alleged
                  untrue statement of any material fact contained in the
                  registration statement, prospectus or statement of additional
                  information for the Policies or contained in the Policies or
                  sales literature or other promotional material for the
                  Policies (or any amendment or supplement to any of the
                  foregoing), or arise out of or are based upon the omission or
                  the alleged omission to state therein a material fact required
                  to be stated therein or necessary to make the statements
                  therein not misleading PROVIDED that this agreement to
                  indemnify shall not apply as to any Indemnified Party if such
                  statement or omission or such alleged statement or omission
                  was made in reasonable reliance upon and in conformity with
                  information furnished to the Company or its designee by or on
                  behalf of the Trust or MFS for use in the registration
                  statement, prospectus or statement of additional information
                  for the Policies or in the Policies or sales literature or
                  other promotional material (or any amendment or supplement) or
                  otherwise for use in connection with the sale of the Policies
                  or Shares; or

            (b)   arise out of or as a result of statements or representations
                  (other than statements or representations contained in the
                  registration statement, prospectus, statement of additional
                  information or sales literature or other promotional material
                  of the Trust not supplied by the Company or its designee, or
                  persons under its control and on which the Company has
                  reasonably relied) or wrongful conduct of the Company or
                  persons under its control, with respect to the sale or
                  distribution of the Policies or Shares; or

            (c)   arise out of any untrue statement or alleged untrue statement
                  of a material fact contained in the registration statement,
                  prospectus, statement of additional information, or sales
                  literature or other promotional literature of the Trust, or
                  any amendment thereof or supplement thereto, or the omission
                  or alleged omission to state therein a material fact required
                  to be stated therein or necessary to make the statement or
                  statements therein not misleading, if such statement or
                  omission was made in reliance upon information furnished to
                  the Trust by or on behalf of the Company; or


                                      -9-


            (d)   arise out of or result from any material breach of any
                  representation and/or warranty made by the Company in this
                  Agreement or arise out of or result from any other material
                  breach of this Agreement by the Company; or

            (e)   arise as a result of any failure by the Company to provide the
                  services and furnish the materials under the terms of this
                  Agreement;

      as limited by and in accordance with the provisions of this Article VIII.

      8.2.  INDEMNIFICATION BY THE TRUST

            The Trust agrees to indemnify and hold harmless the Company and each
      of its directors and officers and each person, if any, who controls the
      Company within the meaning of Section 15 of the 1933 Act, and any agents
      or employees of the foregoing (each an "Indemnified Party," or
      collectively, the "Indemnified Parties" for purposes of this Section 8.2)
      against any and all losses, claims, damages, liabilities (including
      amounts paid in settlement with the written consent of the Trust) or
      expenses (including reasonable counsel fees) to which any Indemnified
      Party may become subject under any statute, at common law or otherwise,
      insofar as such losses, claims, damages, liabilities or expenses (or
      actions in respect thereof) or settlements are related to the sale or
      acquisition of the Shares or the Policies and:

            (a)   arise out of or are based upon any untrue statement or alleged
                  untrue statement of any material fact contained in the
                  registration statement, prospectus, statement of additional
                  information or sales literature or other promotional material
                  of the Trust (or any amendment or supplement to any of the
                  foregoing), or arise out of or are based upon the omission or
                  the alleged omission to state therein a material fact required
                  to be stated therein or necessary to make the statement
                  therein not misleading, PROVIDED that this agreement to
                  indemnify shall not apply as to any Indemnified Party if such
                  statement or omission or such alleged statement or omission
                  was made in reasonable reliance upon and in conformity with
                  information furnished to the Trust, MFS, the Underwriter or
                  their respective designees by or on behalf of the Company for
                  use in the registration statement, prospectus or statement of
                  additional information for the Trust or in sales literature or
                  other promotional material for the Trust (or any amendment or
                  supplement) or otherwise for use in connection with the sale
                  of the Policies or Shares; or

            (b)   arise out of or as a result of statements or representations
                  (other than statements or representations contained in the
                  registration statement, prospectus, statement of additional
                  information or sales literature or other promotional material
                  for the Policies not supplied by the Trust, MFS, the
                  Underwriter or any of their respective designees or persons
                  under their respective control and on which any such entity
                  has reasonably relied) or wrongful conduct of the Trust or
                  persons under its control, with respect to the sale or
                  distribution of the Policies or Shares; or

            (c)   arise out of any untrue statement or alleged untrue statement
                  of a material fact contained in the registration statement,
                  prospectus, statement of additional information, or sales
                  literature or other promotional literature of the Accounts or
                  relating to the Policies, or any amendment thereof or
                  supplement thereto, or the omission or alleged omission to
                  state therein a material fact required to be stated therein or
                  necessary to make the statement or statements therein not
                  misleading, if such statement or omission was made in reliance
                  upon information furnished to the Company by or on behalf of
                  the Trust, MFS or the Underwriter; or


                                      -10-


            (d)   arise out of or result from any material breach of any
                  representation and/or warranty made by the Trust in this
                  Agreement (including a failure, whether unintentional or in
                  good faith or otherwise, to comply with the diversification
                  requirements specified in Article VI of this Agreement) or
                  arise out of or result from any other material breach of this
                  Agreement by the Trust; or

            (e)   arise out of or result from the materially incorrect or
                  untimely calculation or reporting of the daily net asset value
                  per share or dividend or capital gain distribution rate; or

            (f)   arise as a result of any failure by the Trust to provide the
                  services and furnish the materials under the terms of the
                  Agreement;

      as limited by and in accordance with the provisions of this Article VIII.

      8.3. In no event shall the Trust be liable under the indemnification
      provisions contained in this Agreement to any individual or entity,
      including without limitation, the Company, or any Participating Insurance
      Company or any Policy holder, with respect to any losses, claims, damages,
      liabilities or expenses that arise out of or result from (i) a breach of
      any representation, warranty, and/or covenant made by the Company
      hereunder or by any Participating Insurance Company under an agreement
      containing substantially similar representations, warranties and
      covenants; (ii) the failure by the Company or any Participating Insurance
      Company to maintain its segregated asset account (which invests in any
      Portfolio) as a legally and validly established segregated asset account
      under applicable state law and as a duly registered unit investment trust
      under the provisions of the 1940 Act (unless exempt therefrom); or (iii)
      the failure by the Company or any Participating Insurance Company to
      maintain its variable annuity and/or variable life insurance contracts
      (with respect to which any Portfolio serves as an underlying funding
      vehicle) as life insurance, endowment or annuity contracts under
      applicable provisions of the Code.

      8.4. Neither the Company nor the Trust shall be liable under the
      indemnification provisions contained in this Agreement with respect to any
      losses, claims, damages, liabilities or expenses to which an Indemnified
      Party would otherwise be subject by reason of such Indemnified Party's
      willful misfeasance, willful misconduct, or gross negligence in the
      performance of such Indemnified Party's duties or by reason of such
      Indemnified Party's reckless disregard of obligations and duties under
      this Agreement.

      8.5. Promptly after receipt by an Indemnified Party under this Section
      8.5. of notice of commencement of any action, such Indemnified Party will,
      if a claim in respect thereof is to be made against the indemnifying party
      under this section, notify the indemnifying party of the commencement
      thereof; but the omission so to notify the indemnifying party will not
      relieve it from any liability which it may have to any Indemnified Party
      otherwise than under this section. In case any such action is brought
      against any Indemnified Party, and it notified the indemnifying party of
      the commencement thereof, the indemnifying party will be entitled to
      participate therein and, to the extent that it may wish, assume the
      defense thereof, with counsel satisfactory to such Indemnified Party.
      After notice from the indemnifying party of its intention to assume the
      defense of an action, the Indemnified Party shall bear the expenses of any
      additional counsel obtained by it, and the indemnifying party shall not be
      liable to such Indemnified Party under this section for any legal or other
      expenses subsequently incurred by such Indemnified Party in connection
      with the defense thereof other than reasonable costs of investigation.

      8.6. Each of the parties agrees promptly to notify the other parties of
      the commencement of any litigation or proceeding against it or any of its
      respective officers, directors, trustees, employees or 1933 Act control
      persons in connection with the Agreement, the issuance or sale of the
      Policies, the operation of the Accounts, or the sale or acquisition of
      Shares.


                                      -11-


      8.7. A successor by law of the parties to this Agreement shall be entitled
      to the benefits of the indemnification contained in this Article VIII. The
      indemnification provisions contained in this Article VIII shall survive
      any termination of this Agreement.

ARTICLE IX. APPLICABLE LAW

      9.1. This Agreement shall be construed and the provisions hereof
      interpreted under and in accordance with the laws of The Commonwealth of
      Massachusetts.

      9.2. This Agreement shall be subject to the provisions of the 1933, 1934
      and 1940 Acts, and the rules and regulations and rulings thereunder,
      including such exemptions from those statutes, rules and regulations as
      the SEC may grant and the terms hereof shall be interpreted and construed
      in accordance therewith.

ARTICLE X. NOTICE OF FORMAL PROCEEDINGS

     The Trust, MFS, and the Company agree that each such party shall promptly
notify the other parties to this Agreement, in writing, of the institution of
any formal proceedings brought against such party or its designees by the NASD,
the SEC, or any insurance department or any other regulatory body regarding such
party's duties under this Agreement or related to the sale of the Policies, the
operation of the Accounts, or the purchase of the Shares.

ARTICLE XI. TERMINATION

      11.1. This Agreement shall terminate with respect to the Accounts, or one,
            some, or all Portfolios:

            (a)   at the option of any party upon six (6) months' advance
                  written notice to the other parties; or

            (b)   at the option of the Company to the extent that the Shares of
                  Portfolios are not reasonably available to meet the
                  requirements of the Policies or are not "appropriate funding
                  vehicles" for the Policies, as reasonably determined by the
                  Company. Without limiting the generality of the foregoing, the
                  Shares of a Portfolio would not be "appropriate funding
                  vehicles" if, for example, such Shares did not meet the
                  diversification or other requirements referred to in Article
                  VI hereof; or if the Company would be permitted to disregard
                  Policy owner voting instructions pursuant to Rule 6e-2 or
                  6e-3(T) under the 1940 Act. Prompt notice of the election to
                  terminate for such cause and an explanation of such cause
                  shall be furnished to the Trust by the Company; or

            (c)   at the option of the Trust or MFS upon institution of formal
                  proceedings against the Company by the NASD, the SEC, or any
                  insurance department or any other regulatory body regarding
                  the Company's duties under this Agreement or related to the
                  sale of the Policies, the operation of the Accounts, or the
                  purchase of the Shares; or

            (d)   at the option of the Company upon institution of formal
                  proceedings against the Trust by the NASD, the SEC, or any
                  state securities or insurance department or any other
                  regulatory body regarding the Trust's or MFS' duties under
                  this Agreement or related to the sale of the Shares; or


                                      -12-



            (e)   at the option of the Company, the Trust or MFS upon receipt of
                  any necessary regulatory approvals and/or the vote of the
                  Policy owners having an interest in the Accounts (or any
                  subaccounts) to substitute the shares of another investment
                  company for the corresponding Portfolio Shares in accordance
                  with the terms of the Policies for which those Portfolio
                  Shares had been selected to serve as the underlying investment
                  media. The Company will give thirty (30) days' prior written
                  notice to the Trust of the Date of any proposed vote or other
                  action taken to replace the Shares; or

            (f)   termination by either the Trust or MFS by written notice to
                  the Company, if either one or both of the Trust or MFS
                  respectively, shall determine, in their sole judgment
                  exercised in good faith, that the Company has suffered a
                  material adverse change in its business, operations, financial
                  condition, or prospects since the date of this Agreement or is
                  the subject of material adverse publicity, and such material
                  adverse change or material adverse publicity will have a
                  material adverse impact upon their business operations; or

            (g)   termination by the Company by written notice to the Trust and
                  MFS, if the Company shall determine, in its sole judgment
                  exercised in good faith, that the Trust or MFS has suffered a
                  material adverse change in this business, operations,
                  financial condition or prospects since the date of this
                  Agreement or is the subject of material adverse publicity, and
                  such material adverse change or material adverse publicity
                  will have a material adverse impact upon their business or
                  operations; or

            (h)   at the option of any party to this Agreement, upon another
                  party's material breach of any provision of this Agreement; or

            (i)   upon assignment of this Agreement, unless made with the
                  written consent of the parties hereto.

      11.2. The notice shall specify the Portfolio or Portfolios, Policies and,
      if applicable, the Accounts as to which the Agreement is to be terminated.

      11.3. It is understood and agreed that the right of any party hereto to
      terminate this Agreement pursuant to Section 11.1(a) may be exercised for
      cause or for no cause.

      11.4. Except as necessary to implement Policy owner initiated
      transactions, or as required by state insurance laws or regulations, the
      Company shall not redeem the Shares attributable to the Policies (as
      opposed to the Shares attributable to the Company's assets held in the
      Accounts), and the Company shall not prevent Policy owners from allocating
      payments to a Portfolio that was otherwise available under the Policies,
      until thirty (30) days after the Company shall have notified the Trust of
      its intention to do so.

      11.5. Notwithstanding any termination of this Agreement, the Trust and MFS
      shall, at the option of the Company, continue to make available additional
      shares of the Portfolios pursuant to the terms and conditions of this
      Agreement, for all Policies in effect on the effective date of termination
      of this Agreement (the "Existing Policies"), except as otherwise provided
      under Article VII of this Agreement. Specifically, without limitation, the
      owners of the Existing Policies shall be permitted to transfer or
      reallocate investment under the Policies, redeem investments in any
      Portfolio and/or invest in the Trust upon the making of additional
      purchase payments under the Existing Policies.


                                      -13-



ARTICLE XII. NOTICES

     Any notice shall be sufficiently given when sent by registered or certified
mail, overnight courier or facsimile to the other party at the address of such
party set forth below or at such other address as such party may from time to
time specify in writing to the other party.

      If to the Trust:

            MFS VARIABLE INSURANCE TRUST
            500 Boylston Street
            Boston, Massachusetts  02116
            Facsimile No.: (617) 954-6624
            Attn:  Stephen E. Cavan, Secretary

      If to the Company:

            PFL LIFE INSURANCE COMPANY
            4333 Edgewood Road NE
            Cedar Rapids, Iowa  52499-0001
            Facsimile No.: (319) 297-8290
            Attn:  Financial Markets Division, Legal Department

      If to MFS:

            MASSACHUSETTS FINANCIAL SERVICES COMPANY
            500 Boylston Street
            Boston, Massachusetts  02116
            Facsimile No.: (617) 954-6624
            Attn:  Stephen E. Cavan, General Counsel

ARTICLE XIII. MISCELLANEOUS

      13.1. Subject to the requirement of legal process and regulatory
      authority, each party hereto shall treat as confidential the names and
      addresses of the owners of the Policies and all information reasonably
      identified as confidential in writing by any other party hereto and,
      except as permitted by this Agreement or as otherwise required by
      applicable law or regulation, shall not disclose, disseminate or utilize
      such names and addresses and other confidential information without the
      express written consent of the affected party until such time as it may
      come into the public domain.

      13.2. The captions in this Agreement are included for convenience of
      reference only and in no way define or delineate any of the provisions
      hereof or otherwise affect their construction or effect.

      13.3. This Agreement may be executed simultaneously in one or more
      counterparts, each of which taken together shall constitute one and the
      same instrument.

      13.4. If any provision of this Agreement shall be held or made invalid by
      a court decision, statute, rule or otherwise, the remainder of the
      Agreement shall not be affected thereby.

      13.5. The Schedule attached hereto, as modified from time to time, is
      incorporated herein by reference and is part of this Agreement.


                                      -14-


      13.6. Each party hereto shall cooperate with each other party in
      connection with inquiries by appropriate governmental authorities
      (including without limitation the SEC, the NASD, and state insurance
      regulators) relating to this Agreement or the transactions contemplated
      hereby.

      13.7. The rights, remedies and obligations contained in this Agreement are
      cumulative and are in addition to any and all rights, remedies and
      obligations, at law or in equity, which the parties hereto are entitled to
      under state and federal laws.

      13.8. A copy of the Trust's Declaration of Trust is on file with the
      Secretary of State of The Commonwealth of Massachusetts. The Company
      acknowledges that the obligations of or arising out of this instrument are
      not binding upon any of the Trust's trustees, officers, employees, agents
      or shareholders individually, but are binding solely upon the assets and
      property of the Trust in accordance with its proportionate interest
      hereunder. The Company further acknowledges that the assets and
      liabilities of each Portfolio are separate and distinct and that the
      obligations of or arising out of this instrument are binding solely upon
      the assets or property of the Portfolio on whose behalf the Trust has
      executed this instrument. The Company also agrees that the obligations of
      each Portfolio hereunder shall be several and not joint, in accordance
      with its proportionate interest hereunder, and the Company agrees not to
      proceed against any Portfolio for the obligations of another Portfolio.


                                      -15-



      IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement
to be executed in its name and on its behalf by its duly authorized
representative and its seal to be hereunder affixed hereto as of the date
specified above.

                       PFL LIFE INSURANCE COMPANY
                       By its authorized officer,

                       By:  /s/ WILLIAM L. BUSLER
                          ----------------------------------
                       Title: President

                       MFS VARIABLE INSURANCE TRUST, ON BEHALF OF THE PORTFOLIOS

                       By its authorized officer and not individually,

                       By: /s/ AL KEITH BRODKIN
                          ----------------------------------
                           A. Keith Brodkin
                           Chairman

                       MASSACHUSETTS FINANCIAL SERVICES COMPANY
                       By its authorized officer,

                       By: /s/ ARNOLD D. SCOTT
                          ----------------------------------
                          Arnold D. Scott
                          Senior Executive Vice President




                                      -16-


                                                    As of ______________________



                                   SCHEDULE A

                        ACCOUNTS, POLICIES AND PORTFOLIOS
                     SUBJECT TO THE PARTICIPATION AGREEMENT



================================================================================================
        NAME OF SEPARATE
        ACCOUNT AND DATE                    POLICIES FUNDED                   PORTFOLIOS
ESTABLISHED BY BOARD OF DIRECTORS         BY SEPARATE ACCOUNT           APPLICABLE TO POLICIES
================================================================================================

                                                                
     PFL Retirement Builder           PFL Life Insurance Company      MFS Emerging Growth Series
    Variable Annuity Account                  Policy Form                 MFS Research Series
         March 29, 1996                   No. AV288-101-95-796           MFS Total Return Series
                                      (including successor forms,         MFS Utilities Series
                                    addenda and endorsements - may
                                             vary by state)
                                         under marketing names:
                                      "Retirement Income Builder
                                           Variable Annuity"
                                      "First Union First Choice
                                           Variable Annuity"
                                    (or successor marketing names)
- ------------------------------------------------------------------------------------------------





                                      -17-