PINNACLE SERIES ACCOUNT OF GREAT WEST LIFE & ANN INS CO
485BPOS, 1997-11-26
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  As filed with the Securities and Exchange Commission on November 26, 1997
                           Registration No. 2-96000

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

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                         POST-EFFECTIVE AMENDMENT NO. 7

                                    FORM S-6

            FOR THE REGISTRATION UNDER THE SECURITIES ACT OF 1933
                                OF SECURITIES OF
                UNIT INVESTMENT TRUSTS REGISTERED ON FORM N-8B-2

A.    Exact Name of Trust:

      GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY PINNACLE SERIES ACCOUNT

B.    Name of Depositor:

      GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY

C.    Completed Address of Depositor's Principal Executive Office:

      8515 East Orchard Road
      Englewood, Colorado 80111

D.    Name and Complete Address of Agent for Service:

      William T. McCallum
      President and Chief Executive Officer
      Great-West Life & Annuity Insurance Company
      8515 East Orchard Road
      Englewood, Colorado  80111

Copies to:

      James F. Jorden, Esq.
      Jorden Burt Berenson & Johnson, LLP
      1025 Thomas Jefferson Street, N.W., Suite 400 East
      Washington, D.C.  20007-0805

It is proposed that this filing will become effective (check appropriate space):

        X   Immediately  upon filing  pursuant to paragraph (b) of Rule 485 On ,
            1997,  pursuant to  paragraph  (b) of Rule 485. 60 days after filing
            pursuant to paragraph (a)(1) of Rule 485. On , pursuant to paragraph
            (a)(1) of Rule 485.  75 days  after  filing  pursuant  to  paragraph
            (a)(2) of Rule 485. On , pursuant to paragraph (a)(2) of Rule
485.

E. Title and amount of securities being registered:

      Interests in the Separate  Account  under Single  Premium  Variable Life
Insurance Policies

F. Proposed  maximum  aggregate  offering  price to the public of the securities
being registered:

      Registrant  has  registered  an  indefinite  amount  of  interests  in the
      Separate Account being offered pursuant to Section 24(f) of the Investment
      Company Act of 1940 and Rule 24f-2 thereunder.

In  reliance  on  no-action  assurances  furnished  to the  Registrant  and  the
Depositor  in  Great-West  Life & Annuity  Insurance  Company,  Pinnacle  Series
Account (publicly  available October 23, 1990), the Registrant has ceased filing
post-effective  amendments  to this  Registration  Statement  and  updating  the
prospectus contained therein. This post-effective  amendment is filed solely for
the  purpose  of  adding  to the  Registration  Statement  the  "reasonableness"
representation  required by Section 26(e) of the Investment Company Act of 1940,
as amended by the  National  Securities  Markets  Improvement  Act of 1996.  The
Registrant  hereby  incorporates by reference the content of the  Post-Effective
Amendment No. 6 to the  Registration  Statement on Form S-6 which was previously
filed with the Securities and Exchange Commission.

The  following  representation  is  to be  inserted  immediately  following  the
paragraph  in  the  Registration  Statement  on  Form  S-6,  which  is  entitled
"UNDERTAKINGS TO FILE REPORTS".

      Great-West Life & Annuity Insurance Company ("GWL&A")  represents that the
      fees and charges  deducted  under the  Contracts,  in the  aggregate,  are
      reasonable  in  relation  to the  services  rendered,  the  expenses to be
      incurred, and the risks assumed by GWL&A.


<PAGE>



                                   SIGNATURES

      Pursuant  to the  requirements  of the  Securities  Act of  1933  and  the
Investment  Company  Act of 1940,  the  Registrant  certifies  that it meets the
requirements of Rule 485(b) for effectiveness and has caused this Post-Effective
Amendment to the Registration  Statement to be signed on its behalf, in the City
of Englewood, State of Colorado, on this day of November 21, 1997.

                                    PINNACLE SERIES ACCOUNT
                                    (Registrant)


                                    By:   /s/ William T. McCallum 
                                          President
                                          and Chief Executive Officer of
                                          Great-West Life & Annuity
                                          Insurance Company

                                    GREAT-WEST LIFE & ANNUITY
                                    INSURANCE COMPANY
                                   (Depositor)


                                    By:   /s/ William T. McCallum
                                          President
                                          and Chief Executive Officer

      As required by the Securities Act of 1933, this  Post-Effective  Amendment
has been signed by the following  persons in the capacities with Great-West Life
& Annuity Insurance Company and on the dates indicated:

Signature and Title                                         Date


/s/ Robert Gratton*                                    November 21, 1997
Director and Chairman of the
Board


/s/ William T. McCallum                                November 21, 1997
Director, President and Chief Executive
Officer 


/s/ Glen R. Derback                                    November 21, 1997
Vice President and Controller


/s/ James Balog*                                       November 21, 1997
Director 



<PAGE>


Signature and Title                                         Date


/s/ James W. Burns*                                    November 21, 1997
Director 


/s/ Orest T. Dackow*                                   November 21, 1997
Director 


/s/ Andre Desmarais*                                   November 21, 1997
Director 


/s/ Paul Desmarais, Jr.*                               November 21, 1997
Director 


____________________________________                   November ______, 1997
Director (Robert G. Graham)


/s/ N. Berne Hart*                                     November 21, 1997
Director 


________________________________                       November ______, 1997
Director (Kevin P. Kavanagh)


________________________________                       November ______, 1997
Director (William Mackness)


/s/ Jerry E.A. Nickerson*                              November 21, 1997
Director 


/s/ P. Michael Pitfield*                               November 21, 1997
Director 


/s/ Michel Plessis-Belair*                             November 21, 1997
Director 


/s/ Brian E. Walsh*                                    November 21, 1997
Director 


*By:  /s/ D.C. Lennox                                  November 21, 1997
      Attorney-in-Fact pursuant to the powers of attorney filed herewith.



                                                 POWER OF ATTORNEY

                                                        RE

                                    GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these  presents,  that I, J.  Balog,  a Member  of the  Board of
Directors  of  Great-West  Life  &  Annuity   Insurance   Company,   a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 10th  day of
November, 1997.


                              /s/ J.  Balog
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ Alrinia B. Balog



<PAGE>





                                POWER OF ATTORNEY

                                       RE

                   GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these  presents,  that I, J.W.  Burns,  a Member of the Board of
Directors  of  Great-West  Life  &  Annuity   Insurance   Company,   a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 12th day of
November, 1997.


                                   /s/ J.W.  Burns
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ Louise Auriol



<PAGE>





                                POWER OF ATTORNEY

                                       RE

                   GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these presents,  that I, O.T.  Dackow,  a Member of the Board of
Directors  of  Great-West  Life  &  Annuity   Insurance   Company,   a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 7th day of
November, 1997.


                              /s/ O.T.  Dackow
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ Laura J. Johnson



<PAGE>





                                POWER OF ATTORNEY

                                       RE

                   GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these presents,  that I, A. Desmarais,  a Member of the Board of
Directors  of  Great-West  Life  &  Annuity   Insurance   Company,   a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this  12th day of
November, 1997.


                                   /s/ A. Desmarais
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ J.W. Burns



<PAGE>





                                POWER OF ATTORNEY

                                       RE

                   GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these presents, that I, P. Desmarais, Jr., a Member of the Board
of  Directors  of  Great-West  Life &  Annuity  Insurance  Company,  a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 12th day of
November, 1997.


                              /s/ P. Desmarais, Jr.
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ Lucie Filteau



<PAGE>





                                                 POWER OF ATTORNEY

                                                        RE

                                    GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these  presents,  that I, R.  Gratton,  a Member of the Board of
Directors  of  Great-West  Life  &  Annuity   Insurance   Company,   a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this  19th day of
November, 1997.


                              /s/ R.  Gratton
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ Nicole Barolet



<PAGE>





                                POWER OF ATTORNEY

                                       RE

                   GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these  presents,  that I,  N.B.  Hart,  a Member of the Board of
Directors  of  Great-West  Life  &  Annuity   Insurance   Company,   a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this  10th  day of
November, 1997.


                                  /s/  N.B.  Hart
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ Wilma J.Hart



<PAGE>




                                POWER OF ATTORNEY

                                       RE

                   GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these presents,  that I, W.T. McCallum, a Member of the Board of
Directors  of  Great-West  Life  &  Annuity   Insurance   Company,   a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 7th day of
November, 1997.


                              /s/ W.T. McCallum
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ Joan Preyer


<PAGE>





                                POWER OF ATTORNEY

                                       RE

                   GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these presents,  that I, J.E.A. Nickerson, a Member of the Board
of  Directors  of  Great-West  Life &  Annuity  Insurance  Company,  a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 17th day of
November, 1997.


                              /a/ J.E.A. Nickerson
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ M. Lynne Reid



<PAGE>





                                POWER OF ATTORNEY

                                       RE

                   GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these presents,  that I, P.M. Pitfield, a Member of the Board of
Directors  of  Great-West  Life  &  Annuity   Insurance   Company,   a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 12th day of
November, 1997.


                              /s/ P.M. Pitfield
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ Diane Meilleur



<PAGE>





                                POWER OF ATTORNEY

                                       RE

                   GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these presents, that I, M. Plessis-Belair, a Member of the Board
of  Directors  of  Great-West  Life &  Annuity  Insurance  Company,  a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 13th day of
November, 1997.


                              /s/ M. Plessis-Belair
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ Danielle Durocher



<PAGE>




                                POWER OF ATTORNEY

                                       RE

                   GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY


Know all men by these  presents,  that I, B.E.  Walsh,  a Member of the Board of
Directors  of  Great-West  Life  &  Annuity   Insurance   Company,   a  Colorado
corporation,  do hereby  constitute  and  appoint  each of D.C.  Lennox and G.R.
Derback as my true and lawful attorney and agent for me and in my name and on my
behalf to do, individually and without the concurrence of the other attorney and
agent, any and all acts and things and to execute any and all instruments  which
either  said  attorney  and  agent may deem  necessary  or  desirable  to enable
Great-West  Life & Annuity  Insurance  Company and Pinnacle  Series  Account,  a
separate and distinct  account of Great-West  Life & Annuity  Insurance  Company
governed under the provisions of the Colorado Insurance Code, to comply with the
Securities  Act of 1933 and the  Investment  Company  Act of 1940 and any rules,
regulations,  and requirements of the Securities and Exchange Commission ("SEC")
thereunder,  including specifically,  but without limiting the generality of the
foregoing,  power and  authority to sign my name,  in my capacity as a Member of
the Board of Directors of Great-West Life & Annuity  Insurance  Company,  to the
SEC Form S-6 filings of Great-West Life & Annuity Insurance Company and Pinnacle
Series Account  (Registration No. 2-96000), and any and all amendments  thereto,
and I hereby ratify and confirm all that either said attorney and agent shall do
or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 11th day of
November, 1997.


                              /s/ B.E.  Walsh
                           Member, Board of Directors
                   Great-West Life & Annuity Insurance Company



Witness:


/s/ Margaret Canty






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