GLENBROOK LIFE & ANNUITY CO
POS AM, 2000-04-21
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AS FILED WITH THE SECURITIES AND EXCHANGE  COMMISSION  ON  APRIL  21,  2000
                                                            FILE NO. 333-50873

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                       POST-EFFECTIVE AMENDMENT NO.   2 /X/

                                       TO

                                    FORM S-3

             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                        GLENROOK LIFE AND ANNUITY COMPANY

                           (Exact Name of Registrant)

    ARIZONA                                            35-1113325
(State or Other Jurisdiction                        (I.R.S. Employer
of Incorporation or Organization)                    Identification Number)

                  3100 SANDERS ROAD, NORTHBROOK, ILLINOIS 60062
                                  847-402-2400

            (Address and Phone Number of Principal Executive Offices)

                               MICHAEL J. VELOTTA
                  VICE PRESIDENT, SECRETARY AND GENERAL COUNSEL
                       GLENBROOK LIFE AND ANNUITY COMPANY

                                3100 SANDERS ROAD

                           NORTHBROOK, ILLINOIS 60062
                                  847-402-2400

       (Name, Complete Address and Telephone Number of Agent for Service)

                                   COPIES TO:

RICHARD T. CHOI, ESQUIRE                     TERRY R. YOUNG, ESQUIRE
FREEDMAN, LEVY, KROLL & SIMONDS                     ALFS, INC
1050 CONNECTICUT AVENUE, N.W.                   3100 SANDERS ROAD
        SUITE 825                              NORTHBROOK, IL 60062
WASHINGTON, D.C. 20036-5366



Approximate  date of  commencement  of proposed sale to the public:  The annuity
contract  covered by this  registration  statement is to be issued  promptly and
from time to time after the effective date of this registration statement.

If any of the  securities  being  registered on this Form are to be offered on a
delayed or continuous  basis  pursuant to Rule 415 under the  Securities  Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box: /X/

<PAGE>


                  THE AIM LIFETIME PLUS(SM) II VARIABLE ANNUITY

Glenbrook Life and Annuity Company                 Prospectus dated May 1, 2000
Post Office Box 94039, Palatine, IL 60094-4039
Telephone Number: 1-800-776-6978

Glenbrook Life and Annuity  Company  ("Glenbrook")  is offering the AIM Lifetime
Plus (SM) II Variable Annuity, an individual and group flexible premium deferred
variable annuity contract  ("Contract").  This prospectus  contains  information
about the  Contract  that you should know before  investing.  Please keep it for
future reference.

The  Contract   currently   offers  20  investment   alternatives   ("investment
alternatives").  The  investment  alternatives  include 3 fixed account  options
("Fixed Account Options") and 17 variable sub-accounts ("Variable Sub-Accounts")
of the  Glenbrook  Life  and  Annuity  Company  Separate  Account  A  ("Variable
Account"). Each Variable Sub-Account invests exclusively in shares of one of the
following funds ("Funds") of AIM Variable Insurance Funds:
<TABLE>
<CAPTION>
<S>                                                  <C>
AIM V.I. Aggressive Growth Fund                      AIM V.I. Government Securities Fund
AIM V.I. Balanced Fund                               AIM V.I. Growth Fund
AIM V.I. Blue Chip Fund                              AIM V.I. Growth and Income Fund
AIM V.I. Capital Appreciation Fund                   AIM V.I. High Yield Fund
AIM V.I. Capital Development Fund                    AIM V.I. International Equity Fund
AIM V.I. Dent Demographics Fund                      AIM V.I. Money Market Fund
AIM V.I. Diversified Income Fund                     AIM V.I. Telecommunications and Technology Fund*
AIM V.I. Global Growth and Income Fund               AIM V.I. Value Fund
AIM V.I. Global Utilities Fund
</TABLE>

*Effective   January  3,  2000,   the  Fund  changed  its  name  from  AIM  V.I.
Telecommunications  Fund to AIM V.I.  Telecommunications  and Technology Fund to
reflect changes in its investment policies.  We have made a corresponding change
in the name of the Sub-Account that invests in that Fund.

We (Glenbrook)  have filed a Statement of Additional  Information,  dated May 1,
2000,  with the Securities  and Exchange  Commission  ("SEC").  It contains more
information  about the Contract and is incorporated  herein by reference,  which
means it is legally a part of this prospectus.  Its table of contents appears on
page C-1 of this  prospectus.  For a free copy,  please  write or call us at the
address   or   telephone   number   above,   or  go  to  the   SEC's   Web  site
(http://www.sec.gov).  You can find other  information  and documents  about us,
including  documents that are legally part of this prospectus,  at the SEC's Web
site.

                                      The Securities and Exchange Commission has
                                      not approved or disapproved the securities
                                      described in this  prospectus,  nor has it
                                      passed on the  accuracy or the adequacy of
                                      this  prospectus.  Anyone  who  tells  you
                                      otherwise is committing a federal crime.

          IMPORTANT                   The Contracts may be distributed through
           NOTICES                    broker-dealers  that have  relationships
                                      with banks or other financial institutions
                                      or by employees of such banks.  However,
                                      the Contracts  are not deposits, or
                                      obligations of, or guaranteed
                                      by  such   institutions   or  any  federal
                                      regulatory   agency.   Investment  in  the
                                      Contracts   involves   investment   risks,
                                      including possible loss of principal.

                                      The Contracts are not FDIC insured.

<PAGE>

<TABLE>
<CAPTION>
<S>                                                                                                     <C>
TABLE OF CONTENTS

                                                                                                        Page

Overview                       Important Terms.......................................................   3
                               The Contract At A Glance..............................................   4
                               How the Contract Works................................................   6
                               Expense Table.........................................................   7
                               Financial Information.................................................  10

Contract Features              The Contract..........................................................  11
                               Purchases.............................................................  13
                               Contract Value........................................................  14
                               Investment Alternatives...............................................  15
                                          The Variable Sub-Accounts..................................  15
                                          The Fixed Account Options..................................  16
                                          Transfers..................................................  19
                               Expenses..............................................................  22
                               Access To Your Money..................................................  25
                               Income Payments.......................................................  27
                               Death Benefits........................................................  30

Other Information              More Information:
                                          Glenbrook..................................................  33
                                          The Variable Account.......................................  33
                                          The Funds..................................................  34
                                          The Contract...............................................  34
                                          Qualified Plans............................................  35
                                          Legal Matters..............................................  35
                                          Year 2000..................................................  35
                               Taxes.................................................................  37
                               Annual Reports and Other Documents....................................  40
                               Performance Information...............................................  41
                               Experts...............................................................  42
                               Appendix A--Accumulation Unit Values..................................   A-1
                               Appendix B - Market Value Adjustment Example..........................   B-1
                               Statement of Additional Information Table of Contents.................   C-1



</TABLE>

<PAGE>

IMPORTANT TERMS

This  prospectus  uses a number of important  terms that you may not be familiar
with.  The index below  identifies  the page that describes each term. The first
use of each term in this prospectus appears in highlights.
<TABLE>
<CAPTION>
<S>                                                                                         <C>

                                                                                            Page

           Accumulation Phase.............................................................  6
           Accumulation Unit..............................................................10,14
           Accumulation Unit Value........................................................10,14
           Annuitant...................................................................... 11
           Automatic Additions Program.................................................... 13
           Automatic Fund Rebalancing Program............................................. 20
           Beneficiary.................................................................... 11
           Cancellation Period............................................................  4
           *Contract......................................................................6,11
           Contract Anniversary...........................................................  5
           Contract Owner ("You").........................................................  6
           Contract Value................................................................. 14
           Contract Year..................................................................  4
           Death Benefit Anniversary...................................................... 30
           Dollar Cost Averaging Program.................................................. 20
           Due Proof of Death............................................................. 31
           Enhanced Death Benefit Rider................................................... 30
           Enhanced Death and Income Benefit Combination Rider............................ 31
           Fixed Account Options..........................................................16-18
           Free Withdrawal Amount......................................................... 23
           Funds.......................................................................... 15
           Glenbrook ("We")...............................................................1,33
           Guarantee Period............................................................... 16
           Income Plan....................................................................6,27
           Investment Alternatives........................................................  1
           Issue Date.....................................................................  6
           Market Value Adjustment........................................................ 18
           Payout Phase...................................................................  6
           Payout Start Date.............................................................. 27
           Qualified Contract.............................................................  4
           Right to Cancel................................................................ 13
           SEC............................................................................  1
           Settlement Value............................................................... 30
           Systematic Withdrawal Program.................................................. 25
           Treasury Rate.................................................................. 18
           Valuation Date................................................................. 13
           Variable Account...............................................................1,33
           Variable Sub-Account...........................................................1,15

           * If you purchase a group  Contract,  we will issue you a certificate
           that  represents your ownership and that summarizes the provisions of
           the Contract.  References to  "Contract" in this  prospectus  include
           certificates,  unless  the  context  requires  otherwise.  In certain
           states, the Contract is available only as a group Contract.
</TABLE>

<PAGE>

THE CONTRACT AT A GLANCE

The following is a snapshot of the  Contract.  Please read the remainder of this
prospectus for more information.

<TABLE>
<CAPTION>

<S>                                           <C>
Flexible Payments                             You can purchase a Contract  with as little
                                              as $5,000 ($2,000 for "Qualified
                                              Contracts," which are Contracts issued with
                                              qualified plans).  You can    add toyour
                                              Contract as often and as much as you like,
                                              but each payment must be at least $500
                                              ($100 for automatic purchase payments to
                                              the variable investment options).  You must
                                              maintain a minimum account size of $1,000.

Right to Cancel                               You may cancel your Contract
                                              within 20 days of receipt or any longer
                                              period as your state may require
                                              ("Cancellation Period"). Upon cancellation
                                              we will return your purchase payments
                                              adjusted, to the extent federal or state law permits,
                                              to reflect the investment experience of any
                                              amounts allocated to the Variable Account.

Expenses                                      You will bear the following expenses:

                                              o  Total  Variable  Account annual
                                                 fees  equal to 1.10% of average
                                                 daily net assets  (1.30% if you
                                                 select   the   Enhanced   Death
                                                 Benefit  Rider and 1.50% if you
                                                 select the  Enhanced  Death and
                                                 Income   Benefit    Combination
                                                 Rider)

                                              o  Annual contract maintenance charge of
                                                 $35 (with certain exceptions)
                                              o  Withdrawal charges ranging from
                                                 0% to 7% of  payment  withdrawn
                                                 (with certain exceptions)

                                              o  Transfer fee of $10 after 12th transfer
                                                 in any Contract Year (fee currently
                                                 waived)
                                              o  State premium tax (if your state
                                                 imposes one)

                                              In   addition,   each   Fund  pays
                                              expenses   that  you   will   bear
                                              indirectly  if  you  invest  in  a
                                              Variable Sub-Account.

Investment
Alternatives                                  The Contract  offers 20 investment
                                              alternatives including:

                                              o  3 Fixed Account Options (which credit
                                                 interest at rates we guarantee)
                                              o  17    Variable     Sub-Accounts
                                                 investing  in  Funds   offering
                                                 professional  money  management
                                                 by A I M Advisors, Inc.

                                              To find out  current  rates  being
                                              paid on the Fixed Account Options,
                                              or to find  out  how the  Variable
                                              Sub-Accounts    have    performed,
                                              please call us at 1-800-776-6978.

<PAGE>

Special Services                              For your convenience,  we
                                              offer these special services:

                                              o  Automatic Fund Rebalancing Program
                                              o  Automatic Additions Program
                                              o  Dollar Cost Averaging Program
                                              o  Systematic Withdrawal Program

Income Payments                                You  can  choose  fixed
                                               income payments,  variable income
                                               payments, or a combination of the
                                               two.  You can receive your income
                                               payments in one of the  following
                                               ways:

                                               o  life income with guaranteed payments
                                               o  a joint and survivor life income with
                                                  guaranteed payments
                                               o  guaranteed payments for a specified
                                                  period (5 to 30 years)

Death Benefits                                 If you die before the Payout Start Date,
                                               we will pay the death benefit described
                                               in the Contract.  We also offer an
                                               Enhanced Death Benefit Rider and an
                                               Enhanced Death and Income Benefit
                                               Combination Rider.

Transfers                                      Before the Payout Start Date, you
                                               may transfer your Contract  value
                                               ("Contract   Value")   among  the
                                               investment   alternatives,   with
                                               certain restrictions.  No minimum
                                               applies   to   the   amount   you
                                               transfer.

                                               We do not currently  impose a fee
                                               upon   transfers.   However,   we
                                               reserve  the right to charge  $10
                                               per   transfer   after  the  12th
                                               transfer in each "Contract Year,"
                                               which we measure from the date we
                                               issue your contract or a Contract
                                               anniversary ("Contract
                                               Anniversary").

Withdrawals                                    You may  withdraw  some or all of
                                               your  Contract  Value at  anytime
                                               during the Accumulation Phase.

                                               In general, you must withdraw at least $50
                                               at a time.  A 10% federal tax penalty may
                                               apply if you withdraw before you are 59
                                               1/2 years old.  A withdrawal charge and
                                               Market Value Adjustment also may apply.
</TABLE>


<PAGE>

HOW THE CONTRACT WORKS The Contract basically works in two ways.


First, the Contract can help you (we assume you are the Contract owner) save for
retirement because you can invest in up to 20 investment alternatives and pay no
federal income taxes on any earnings until you withdraw them. You do this during
what we call the "Accumulation  Phase" of the Contract.  The Accumulation  Phase
begins on the date we issue your  Contract (we call that date the "Issue  Date")
and continues until the Payout Start Date, which is the date we apply your money
to provide income payments. During the Accumulation Phase, you may allocate your
purchase payments to any combination of the Variable  Sub-Accounts  and/or Fixed
Account  Options.  If you invest in the Fixed Account  Options,  you will earn a
fixed rate of interest that we declare periodically. If you invest in any of the
Variable Sub-Accounts,  your investment return will vary up or down depending on
the performance of the corresponding Funds.


Second,  the Contract can help you plan for retirement because you can use it to
receive  retirement  income for life  and/or for a pre-set  number of years,  by
selecting  one of the income  payment  options  (we call these  "Income  Plans")
described  on page 27.  You  receive  income  payments  during  what we call the
"Payout  Phase" of the  Contract,  which  begins on the  Payout  Start  Date and
continues until we make the last payment required by the Income Plan you select.
During the  Payout  Phase,  if you  select a fixed  income  payment  option,  we
guarantee the amount of your payments,  which will remain fixed. If you select a
variable  income  payment  option,   based  on  one  or  more  of  the  Variable
Sub-Accounts,  the amount of your payments will vary up or down depending on the
performance of the corresponding Funds. The amount of money you accumulate under
your  Contract  during the  Accumulation  Phase and apply to an Income Plan will
determine the amount of your income payments during the Payout Phase.

The timeline below illustrates how you might use your Contract.
<TABLE>
<CAPTION>
<S>                <C>                               <C>               <C>                 <C>               <C>
Issue                                                Payout Start
Date               Accumulation Phase                    Date          Payout Phase

- ---------------------------------------------------------------------------------------------------------------------
|                                                         |                                 |
                   You save for retirement                                                                 >

You buy                                          You elect to receive                  You can receive      Or you can
a Contract                                       income payments or receive            income payments      receive income
                                                 a lump sum payment                    for a set period     payments for life


</TABLE>
As the Contract owner, you exercise all of the rights and privileges provided by
the Contract. If you die, any surviving Contract owner, or if there is none, the
Beneficiary  will exercise the rights and  privileges  provided by the Contract.
See "The  Contract."  In addition,  if you die before the Payout Start Date,  we
will pay a death benefit to any surviving  Contract  owner, or if there is none,
to your Beneficiary. See "Death Benefits."

Please call us at 1-800-776-6978 if you have any question about how the Contract
works.

<PAGE>

EXPENSE TABLE
- ----------------------------------------------------------------------------
The table below lists the  expenses  that you will bear  directly or  indirectly
when you buy a Contract.  The table and the examples  that follow do not reflect
premium taxes imposed by the state where you reside.  For more information about
Variable Account  expenses,  see "Expenses,"  below. For more information  about
Fund expenses, please refer to the accompanying prospectus for the Funds.
- ----------------------------------------------------------------------------
CONTRACT OWNER TRANSACTION EXPENSES

Withdrawal Charge (as a percentage of purchase payments)*

Number of Complete Years Since We Received the Purchase

Payment Being Withdrawn:    0      1     2       3      4      5       6     7+

Applicable Charge:          7%      7%    6%     6%     5%      4%     3%    0%

Annual Contract Maintenance Charge.................................... $35.00**
Transfer Fee........................ ................................. $10.00***

    * Each Contract Year, you may withdraw up to 15% of the Contract Value as of
    the beginning of the Contract Year without  incurring a withdrawal charge or
    Market Value Adjustment.

    ** We will waive this charge in certain cases.  See "Expenses."

    ***Applies  solely  to the  thirteenth  and  subsequent  transfers  within a
    Contract  Year,  excluding  transfers  due  to  dollar  cost  averaging  and
    automatic fund rebalancing. We are currently waiving the transfer fee.
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------
VARIABLE  ACCOUNT  ANNUAL  EXPENSES
(as a percentage  of average  daily net asset value deducted from each Variable Sub-Account)

<S>                                                                                      <C>
Mortality and Expense Risk Charge.........................................................1.00%*
Administrative Expense Charge.............................................................0.10%
Total Variable Account Annual Expenses....................................................1.10%
- --------------------------------------
</TABLE>

    * If you select the Enhanced Death Benefit Rider,  the mortality and expense
    risk  charge  will be equal to 1.20% of your  Contract's  average  daily net
    assets in the Variable Account.  If you select the Enhanced Death and Income
    Benefit  Combination  Rider,  the  mortality and expense risk charge will be
    equal to 1.40% of the daily net assets of the Variable Account.
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
FUND ANNUAL  EXPENSES  (After  Voluntary  Reductions and  Reimbursements)
(as a percentage of Fund average daily net assets)(1)

<S>                                                      <C>                <C>                   <C>
                                                          Management                              Total Annual
Fund                                                        Fees            Other Expenses        Fund Expenses


AIM V.I. Aggressive Growth Fund (2)                          .80%               1.62%                2.42%
AIM V.I. Balanced Fund (2)                                   .75%                .56%                1.31%
AIM V.I. Blue Chip Fund(2)                                  0.75%               0.55%                1.30%
AIM V.I. Capital Appreciation Fund                           .62%                .11%                 .73%
AIM V.I. Capital Development Fund (2)                        .75%               2.67%                3.42%
AIM V.I. Dent Demographics Fund(2)                         0.85%                0.55%                1.40%
AIM V.I. Diversified Income Fund                             .60%                .23%                 .83%
AIM V.I. Global Growth and Income Fund(2)                  1.00%                0.37%                1.37%
AIM V.I. Global Utilities Fund                               .65%                .49%                1.14%
AIM V.I. Government Securities Fund                          .50%                .40%                 .90%
AIM V.I. Growth Fund                                         .63%                .10%                 .73%
AIM V.I. Growth and Income Fund                              .61%                .16%                 .77%
AIM V.I. High Yield Fund(2)                                  .63%                .79%                1.42%
AIM V.I. International Equity Fund                           .75%                .22%                 .97%
AIM V.I. Money Market Fund                                   .40%                .20%                 .60%
AIM V.I. Telecommunications and Technology Fund            1.00%                0.27%                1.27%
AIM V.I. Value Fund                                          .61%                .15%                 .76%

(1)  Figures shown in the table are for the year ended December 31, 1999.
(2)  Absent  voluntary   reductions  and   reimbursements   for  certain  Funds,
     management fees, other expenses,  and total annual fund expenses  expressed
     as a  percentage  of  average  net  assets of the Funds  would have been as
     follows:
- -----------------------------------------------------------------------------------------------------------------
AIM V.I. Aggressive Growth Fund                                      0.80%               3.82%              4.62%
AIM V.I. Balanced Fund                                               0.75%               2.08%              2.83%
AIM V.I. Capital Development Fund                                    0.75%               5.05%               5.80%
AIM V.I. High Yield Fund                                             0.63%               1.87%              2.50%
- ------------------------------------------------------------------------------------------------------------------
</TABLE>


<PAGE>

The AIM V.I.  Blue  Chip,  Dent  Demographics,  Global  Growth and  Income,  and
Telecommunications  and Technology Fund which commenced operations on January 3,
2000. For the latter funds,  the management fee, other expenses and total annual
fund  operating  expenses are based on estimates  for these Funds'  current full
fiscal year.

EXAMPLE 1

The  example  below  shows the  dollar  amount of  expenses  that you would bear
directly or indirectly if you:

o          invested $1,000 in a Variable Sub-Account,
o          earned a 5% annual return on your investment, and
o          surrendered your Contract, or you began receiving income payments
           for a specified period of less than 120 months, at the end of each
           time period.

The example does not include any taxes or tax  penalties  you may be required to
pay if you surrender your Contract.
<TABLE>
<CAPTION>

<S>                                             <C>                 <C>                 <C>                  <C>
SUB-ACCOUNT                                     1 YEAR              3 YEARS             5 YEARS              10 YEARS


AIM V.I. Aggressive Growth                      $101                $176                  $243                $425
AIM V.I. Balanced                                $90                $144                  $191                $322
AIM V.I.  Blue Chip                              $90                $144                  $190                $321
AIM V.I. Capital Appreciation                    $85                $127                  $162                $264
AIM V.I. Capital Development                    $110                $204                  $288                $508
AIM V.I. Dent Demographics                       $91                $147                  $195                $331
AIM V.I. Diversified Income                      $86                $130                  $167                $274
AIM V.I. Global Growth and Income                $91                $146                  $194                $328
AIM V.I. Global Utilities                        $88                $139                  $182                $306
AIM V.I. Government Securities                   $86                $132                  $171                $281
AIM V.I. Growth                                  $85                $127                  $162                $264
AIM V.I. Growth and Income                       $85                $129                  $164                $268
AIM V.I. High Yield                              $91                $147                  $196                $333
AIM V.I. International Equity                    $87                $134                  $174                $289
AIM V.I. Money Market                            $83                $124                  $156                $250
AIM V.I. Telecommunications and Technology       $90                $143                  $189                $318
AIM V.I. Value                                   $85                $128                  $164                $267


</TABLE>

EXAMPLE 2

Same  assumptions  as Example 1 above,  except that you decided not to surrender
your Contract,  or you began receiving  income payments (for at least 120 months
if under an Income Plan for a specified period), at the end of each period.
<TABLE>
<CAPTION>
<S>                                             <C>                 <C>                 <C>                  <C>
SUB-ACCOUNT                                     1 YEAR              3 YEARS             5 YEARS              10 YEARS


AIM V.I. Aggressive Growth                       $41                $123                  $208                $425
AIM V.I. Balanced                                $29                 $90                  $153                $322
AIM V.I. Blue Chip                               $29                 $90                  $153                $321
AIM V.I. Capital Appreciation                    $23                 $72                  $124                $264
AIM V.I. Capital Development                     $51                $153                  $255                $508
AIM V.I. Dent Demographics                       $30                 $93                  $158                $331
AIM V.I. Diversified Income                      $24                 $75                  $129                $274
AIM V.I. Global Growth and Income                $30                 $92                  $156                $328
AIM V.I. Global Utilities                        $28                 $85                  $144                $306
AIM V.I. Government Securities                   $25                 $77                  $132                $281
AIM V.I. Growth                                  $23                 $72                  $124                $264
AIM V.I. Growth and Income                       $24                 $73                  $126                $268
AIM V.I. High Yield                              $31                 $93                  $159                $333
AIM V.I. International Equity                    $26                 $80                  $136                $289
AIM V.I. Money Market                            $22                 $68                  $117                $250
AIM V.I. Telecommunications and Technology       $29                 $89                  $151                $318
AIM V.I. Value                                   $24                 $73                  $125                $267
</TABLE>


Please  remember  that you are looking at examples and not a  representation  of
past or future expenses. Your actual expenses may be lower or greater than those
shown  above.  Similarly,  your rate of return may be lower or greater  than 5%,
which is not guaranteed.  The above examples assume the election of the Enhanced
Death and Income  Benefit  Combination  Rider with a mortality  and expense risk
charge of 1.40%.  If that option were not  elected,  the example  figures  shown
above would be slightly lower. To reflect the contract maintenance charge in the
examples,  we estimated an  equivalent  percentage  charge,  based on an assumed
average Contract size of $57,476.

<PAGE>

FINANCIAL INFORMATION
- ------------------------------------------------------------------------------
To measure the value of your investment in the Variable  Sub-Accounts during the
Accumulation  Phase, we use a unit of measure we call the  "Accumulation  Unit."
Each Variable  Sub-Account  has a separate value for its  Accumulation  Units we
call "Accumulation Unit Value." Accumulation Unit Value is analogous to, but not
the same as, the share price of a mutual fund.

Attached as Appendix A to this  prospectus are tables  showing the  Accumulation
Unit Values of each Variable Sub-Account since its inception. To obtain a fuller
picture of each Variable  Sub-Account's  finances,  please refer to the Variable
Account's  financial   statements  contained  in  the  Statement  of  Additional
Information.  The financial statements of Glenbrook also appear in the Statement
of Additional Information.

<PAGE>

THE CONTRACT
- -------------------------------------------------------------------------------
CONTRACT OWNER

The AIM  Lifetime  Plus(SM) II Variable  Annuity is a contract  between you, the
Contract owner, and Glenbrook,  a life insurance company. As the Contract owner,
you  may  exercise  all of the  rights  and  privileges  provided  to you by the
Contract.  That  means  it is up to you to  select  or  change  (to  the  extent
permitted):

o    the investment alternatives during the Accumulation and Payout Phases,

o    the amount and timing of your purchase payments and withdrawals,

o the programs you want to use to invest or withdraw money, o the income payment
plan you want to use to receive retirement income,

o    the  Annuitant  (either  yourself or someone else) on whose life the income
     payments will be based,


o   the  Beneficiary  or  Beneficiaries  who will receive the benefits  that the
    Contract provides when the last surviving  Contract Owner or Annuitant dies,
    and


o   any other rights that the Contract provides.


If you die,  any  surviving  Contract  owner or, if none,  the  Beneficiary  may
exercise the rights and privileges provided to them by the Contract.


The Contract cannot be jointly owned by both a non-natural  person and a natural
person.  At issue,  the maximum age of Contract Owner,  joint contract owner, or
annuitant if the owner is a non-natural person, cannot exceed age 90 at issue.


You can use the Contract with or without a qualified plan. A qualified plan is a
personal retirement savings plan, such as an IRA or tax-sheltered  annuity, that
meets the requirements of the Internal  Revenue Code.  Qualified plans may limit
or  modify  your  rights  and  privileges  under the  Contract.  We use the term
"Qualified  Contract" to refer to a Contract  issued with a qualified  plan. See
"Qualified Plans" on page 35.

ANNUITANT


The Annuitant is the  individual  whose age  determines  the latest Payout Start
Date and whose life determines the amount and duration of income payments (other
than under Income Plans with guaranteed  payments for a specified  period).  You
initially designate an Annuitant in your application. If the Contract owner is a
natural  person,  you may change the  Annuitant  prior to the Payout Start Date.
Prior to the Payout Start Date,  you may designate a joint  Annuitant,  who is a
second person on whose life income payments depend.  In our discretion,  we may
permit you to designate a joint Annuitant prior to the Payout Start Date.


If the Annuitant dies prior to the Payout Start Date, the new Annuitant will be:

o          the youngest Contract owner if living, otherwise
o          the youngest Beneficiary.

BENEFICIARY

The  Beneficiary  is the person who may elect to  receive  the death  benefit or
become the new Contract owner if the sole  surviving  Contract owner dies before
the Payout  Start  Date.  If the sole  surviving  Contract  owner dies after the
Payout Start Date, the Beneficiary  will receive any guaranteed  income payments
scheduled to continue.

You may name one or more  Beneficiaries  when you apply for a Contract.  You may
change  or add  Beneficiaries  at any  time by  writing  to us  unless  you have
designated an irrevocable  Beneficiary.  We will provide a change of Beneficiary
form to be signed and filed with us. Any change  will be  effective  at the time
you sign the  written  notice,  whether or not the  Annuitant  is living when we
receive  the  notice.   Until  we  receive  your  written  notice  to  change  a
Beneficiary,  we are entitled to rely on the most recent Beneficiary information
in our files.  We will not be liable as to any payment or settlement  made prior
to  receiving  the  written  notice.  Accordingly,  if you wish to  change  your
Beneficiary, you should deliver your written notice to us promptly.

If you did not name a  Beneficiary  or if the  named  Beneficiary  is no  longer
living and there are no other surviving Beneficiaries,  the new Beneficiary will
be:

o     your spouse or, if he or she is no longer alive,
o     your surviving children equally, or if you have no surviving children,
o     your estate.

<PAGE>

If more than one  Beneficiary  survives  you, (or the  Annuitant if the Contract
owner is not a natural  person),  we will  divide the death  benefit  among your
Beneficiaries  according to your most recent written  instructions.  If you have
not  given us  written  instructions,  we will pay the  death  benefit  in equal
amounts to the surviving Beneficiaries.

MODIFICATION OF THE CONTRACT

Only a Glenbrook  officer may approve a change in or waive any  provision of the
Contract.  Any change or waiver must be in writing.  None of our agents have the
authority to change or waive the  provisions of the Contract.  We may not change
the terms of the Contract  without your consent,  except to conform the Contract
to  applicable  law or changes in the law.  If a  provision  of the  Contract is
inconsistent with state law, we will follow state law.

ASSIGNMENT


We will not honor an  assignment  of an interest in a Contract as  collateral or
security for a loan. However,  you may assign periodic income payments under the
Contract  prior to the Payout Start Date.  No  Beneficiary  may assign  benefits
under the  Contract  until they are due. We will not be bound by any  assignment
until the Assignor signs it and files it with us. We are not responsible for the
validity of any assignment. Federal law prohibits or restricts the assignment of
benefits  under many types of  retirement  plans and the terms of such plans may
themselves contain restrictions on assignments. An assignment may also result in
taxes or tax  penalties.  You should  consult with an attorney  before trying to
assign your Contract.


<PAGE>

PURCHASES
- ------------------------------------------------------------------------------
MINIMUM PURCHASE PAYMENTS

Your initial  purchase  payment must be at least $5,000  ($2,000 for a Qualified
Contract).  All subsequent  purchase payments must be $500 or more. You may make
purchase  payments at any time prior to the Payout  Start  Date.  We reserve the
right to limit the maximum amount of purchase  payments we will accept.  We also
reserve the right to reject any application.


MINIMUM AND MAXIMUM ALLOWABLE AGE

You can  purchase a Contract if you are between the your state's age of majority
and 90. If the owner is a non-natural person, then the Annuitant must be between
the ages of 0 and 90.


AUTOMATIC ADDITIONS PROGRAM

You  may  make  additional  purchase  payments  of $100 or  more  per  month  by
automatically  transferring  money from your bank account.  Please  consult with
your sales representative for detailed information.

ALLOCATION OF PURCHASE PAYMENTS


At the time you apply for a  Contract,  you must  decide  how to  allocate  your
purchase payments among the investment alternatives.  The allocation you specify
on your  application will be effective  immediately.  All allocations must be in
whole  percents  that  total  100% or in  whole  dollars.  You can  change  your
allocations  by  notifying  us in  writing.  We  reserve  the right to limit the
availability of the investment alternatives.


We will allocate your purchase payments to the investment alternatives according
to your most  recent  instructions  on file  with us.  Unless  you  notify us in
writing otherwise,  we will allocate  subsequent  purchase payments according to
the allocation for the previous purchase  payment.  We will effect any change in
allocation  instructions  at the time we receive written notice of the change in
good order.

We will credit the initial  purchase  payment that  accompanies  your  completed
application to your Contract within 2 business days after we receive the payment
at our  headquarters.  If your  application  is  incomplete,  we will ask you to
complete your  application  within 5 business days. If you do so, we will credit
your  initial  purchase  payment to your  Contract  within  that 5 business  day
period.  If you do not, we will return your purchase payment at the end of the 5
business day period unless you expressly  allow us to hold it until you complete
the application.  We will credit subsequent purchase payments to the Contract at
the close of the business  day on which we receive the  purchase  payment at our
headquarters.


We use the term  "business  day" to refer to each day Monday through Friday that
the New York Stock Exchange is open for business. We also refer to these days as
"Valuation  Dates." Our  business  day closes  when the New York Stock  Exchange
closes,  usually 4 p.m.  Eastern Time (3 p.m.  Central Time). If we receive your
purchase payment after 3 p.m. Central Time on any Valuation Date, we will credit
your purchase  payment using the  Accumulation  Unit Values computed on the next
Valuation Date.


RIGHT TO CANCEL

You may cancel  your  Contract  by  returning  it to us within the  Cancellation
Period,  which is the 20 day period  after you  receive  the  Contract,  or such
longer period that your state may require. You may return it by delivering it or
mailing  it to us.  If  you  exercise  this  "Right  to  Cancel,"  the  Contract
terminates  and we will  pay you  the  full  amount  of your  purchase  payments
allocated  to the Fixed  Account.  We also will  return your  purchase  payments
allocated to the Variable Account  adjusted,  to the extent federal or state law
permits,  to  reflect  investment  gain or loss that  occurred  from the date of
allocation  through  the date of  cancellation.  Some  states may  require us to
return a greater amount to you.

<PAGE>

CONTRACT VALUE
- ------------------------------------------------------------------------------


On the  Issue  Date,  your  Contract  Value is equal  to your  initial  purchase
payment.  Thereafter,  your Contract  Value at any time during the  Accumulation
Phase  is  equal  to the sum of the  value  of your  Accumulation  Units  in the
Variable Sub-Accounts you have selected,  plus the value of your interest in the
Fixed Account Options.


ACCUMULATION UNITS

To determine the number of  Accumulation  Units of each Variable  Sub-Account to
credit to your  Contract,  we divide (i) the amount of the purchase  payment you
have allocated to a Variable  Sub-Account by (ii) the Accumulation Unit Value of
that  Variable  Sub-Account  next  computed  after we  receive  your  payment or
transfer.  For example,  if we receive a $10,000 purchase payment allocated to a
Variable  Sub-Account  when the  Accumulation  Unit Value for the Sub-Account is
$10, we would credit 1,000  Accumulation  Units of that Variable  Sub-Account to
your Contract.

ACCUMULATION UNIT VALUE

As a general matter,  the Accumulation Unit Value for each Variable  Sub-Account
will rise or fall to reflect:

o   changes in the share price of the Fund in which the Variable Sub-Account
    invests, and

o   the deduction of amounts  reflecting  the mortality and expense risk charge,
    administrative expense charge, and any provision for taxes that have accrued
    since we last calculated the Accumulation Unit Value.


We determine contract maintenance charges, withdrawal charges, and transfer fees
(currently  waived)  separately  for  each  Contract.  They  do not  affect  the
Accumulation Unit Value. Instead, we obtain payment of those charges and fees by
redeeming  Accumulation  Units. For details on how we compute  Accumulation Unit
Value, please refer to the Statement of Additional Information.


We determine a separate Accumulation Unit Value for each Variable Sub-Account on
each  Valuation  Date.  We also  determine a separate set of  Accumulation  Unit
Values  reflecting the cost of the Enhanced Death Benefit Rider and the Enhanced
Death and Income Benefit Combination Rider described on pages ___ and ___ below.

You  should  refer  to the  prospectus  for  the  Funds  that  accompanies  this
prospectus  for a description  of how the assets of each Fund are valued,  since
that  determination  directly  bears  on  the  Accumulation  Unit  Value  of the
corresponding Variable Sub-Account and, therefore, your Contract Value.

<PAGE>

INVESTMENT ALTERNATIVES:  The Variable Sub-Accounts
- ------------------------------------------------------------------------------
You may allocate your purchase payments to up to 17 Variable Sub-Accounts.  Each
Variable  Sub-Account  invests in the shares of a corresponding  Fund. Each Fund
has its own investment  objective(s) and policies. We briefly describe the Funds
below.

For more  complete  information  about each Fund,  including  expenses and risks
associated with the Fund,  please refer to the  accompanying  prospectus for the
Fund. You should carefully review the Fund prospectus before allocating  amounts
to the Variable  Sub-Accounts.  A I M Advisors,  Inc.  serves as the  investment
advisor to each Fund.

<TABLE>
<CAPTION>
<S>                                          <C>
Fund:                                        Each Fund Seeks*:

AIM V.I. Aggressive Growth Fund**            Long-term growth of capital

AIM V.I. Balanced Fund                       As high a total return as possible, consistent with preservation of capital


AIM V.I. Blue Chip Fund                      Long-term growth of capital with a secondary objective of current income


AIM V.I. Capital Appreciation Fund           Growth of capital

AIM V.I. Capital Development Fund            Long-term growth of capital


AIM V. I. Dent Demographics Fund             Long-term growth of capital together with current income


AIM V.I. Diversified Income Fund             High level of current income


AIM V.I. Global Growth and Income Fund       Long-term growth of capital


AIM V.I. Global Utilities Fund               High level of current income and a secondary objective of growth of capital

AIM V.I. Government Securities Fund          High level of current income consistent with reasonable concern for
                                             safety of principal

AIM V.I. Growth Fund                         Growth of capital

AIM V.I. Growth and Income Fund              Growth of capital with a secondary objective of current income

AIM V.I. High Yield Fund                     High level of current income

AIM V.I. International Equity Fund           Long-term growth of capital

AIM V.I. Money Market Fund                   As high a level of current income as is consistent with the preservation
                                             of capital and liquidity


AIM V.I. Telecommunications
and Technology Fund                          Long-term growth of capital


AIM V.I. Value Fund                          Long-term growth of capital
</TABLE>



    * A Fund's investment  objective may be changed by the Fund's Board of
    Directors without shareholder approval.


    ** Due to the sometime  limited  availability  of common stocks of small-cap
    companies that meet the investment  criteria for AIM V.I.  Aggressive Growth
    Fund, the Fund may periodically suspend or limit the offering of its shares.
    The Fund will be closed to new  participants  when Fund  assets  reach  $200
    million. If the Fund is closed, Contract owners maintaining an allocation of
    Contract  Value in that Fund will  nevertheless  be  permitted  to  allocate
    additional purchase payments to the Fund.

Amounts  you  allocate to Variable  Sub-Accounts  may grow in value,  decline in
value, or grow less than you expect,  depending on the investment performance of
the Funds in which those Variable  Sub-Accounts  invest. You bear the investment
risk that the Funds might not meet their  investment  objectives.  Shares of the
Funds are not deposits, or obligations of, or guaranteed or endorsed by any bank
and are not insured by the Federal Deposit  Insurance  Corporation,  the Federal
Reserve Board or any other agency.

<PAGE>

INVESTMENT ALTERNATIVES: The Fixed Account Options
- -----------------------------------------------------------------------------
You may  allocate  all or a  portion  of your  purchase  payments  to the  Fixed
Account.  You may choose from among 3 Fixed Account Options including two dollar
cost  averaging  options  and the  option  to  invest  in one or more  Guarantee
Periods.  The Fixed Account  Options may not be available in all states.  Please
consult  with your  sales  representative  for  current  information.  The Fixed
Account  supports  our  insurance  and annuity  obligations.  The Fixed  Account
consists of our general assets other than those in segregated asset accounts. We
have sole  discretion  to invest  the  assets of the Fixed  Account,  subject to
applicable  law.  Any money you  allocate  to a Fixed  Account  Option  does not
entitle you to share in the investment experience of the Fixed Account.

DOLLAR COST AVERAGING OPTIONS

You may establish a Dollar Cost Averaging  Program,  as described on page 20, by
allocating  purchase  payments to the Fixed Account  either for 6 months (the "6
Month Dollar Cost Averaging Option") or for 12 months (the "12 Month Dollar Cost
Averaging Option"). Your purchase payments will earn interest for the period you
select  at the  current  rates in effect  at the time of  allocation.  Rates may
differ from those available for the Guarantee Periods described below.


You  must  transfer  all of your  money  out of the 6 or 12  Month  Dollar  Cost
Averaging Options to other investment alternatives in equal monthly installments
beginning within 30 days of allocation.  The number of monthly installments must
be no more than 6 for the 6 Month Dollar Cost Averaging Option, and no more than
12 for the 12 Month Dollar Cost Averaging Option. At the end of the applicable 6
or 12 month period,  we will transfer any remaining amounts in the 6 or 12 Month
Dollar  Cost  Averaging  Options  to  the  other  investment   alternatives  you
designated.  Transfers out of the 6 or 12 Month Dollar Cost Averaging Options do
not count towards the 12 transfers you can make without paying a transfer fee.

If we  do  not  receive  allocation  instructions  from  you,  the  payment  and
associated interest will be transferred to Money Market Variable  Sub-Account in
equal monthly installments.


You may not transfer funds from other investment alternatives to either the 6 or
12 Month Dollar Cost Averaging Options.

The 6 or 12 Month  Dollar Cost  Averaging  Options may not be  available in your
state.

GUARANTEE PERIODS

Each  payment or transfer  allocated to a Guarantee  Period earns  interest at a
specified  rate that we guarantee for a period of years.  Guarantee  Periods may
range from 1 to 10 years. We are currently  offering  Guarantee Periods of 1, 3,
5, 7, and 10 years in length.  In the future we may offer  Guarantee  Periods of
different lengths or stop offering some Guarantee Periods.


You select a  Guarantee  Period for each  purchase  or  transfer.  If you do not
select a Guarantee  Period,  we will assign the same  period(s) you selected for
your most recent purchase payment.


We reserve the right to limit the number of  additional  purchase  payments that
you may allocate to this Option.

Interest Rates We will tell you what interest rates and Guarantee Periods we are
offering at a  particular  time.  We may declare  different  interest  rates for
Guarantee  Periods of the same length that begin at different times. We will not
change the interest rate that we credit to a particular allocation until the end
of the relevant Guarantee Period.

We have no specific  formula for  determining  the rate of interest that we will
declare  initially or in the future.  We will set those  interest rates based on
investment returns available at the time of the determination.  In addition,  we
may consider  various  other factors in  determining  interest  rates  including
regulatory  and  tax  requirements,  our  sales  commission  and  administrative
expenses,  general economic trends,  and competitive  factors.  We determine the
interest rates to be declared in our sole discretion. We can neither predict nor
guarantee  what those rates will be in the future.  For  current  interest  rate
information,   please  contact  your  sales   representative   or  Glenbrook  at
1-800-776-6978. The interest rate will never be less than the minimum guaranteed
rate stated in the Contract.

How We Credit Interest We will credit interest daily to each amount allocated to
a Guarantee  Period at a rate that  compounds to the effective  annual  interest
rate that we declared at the beginning of the applicable  Guarantee Period.  The
following  example  illustrates how a purchase payment  allocated to this Option
would grow, given an assumed Guarantee Period and annual interest rate:

Purchase Payment..................................$10,000
Guarantee Period...............................   5 years
Annual Interest Rate............................... 4.50%
<PAGE>

<TABLE>
<CAPTION>

                                                                    END OF CONTRACT YEAR

<S>                                              <C>           <C>             <C>            <C>           <C>
                                                 YEAR 1        YEAR 2          YEAR 3         YEAR 4        YEAR 5

Beginning Contract Value                       $10,000.00
X (1 + Annual Interest Rate)                     X  1.045
                                               ----------
                                               $10,450.00


Contract Value at end of Contract Year                       $10,450.00
X (1 + Annual Interest Rate)                                   X  1.045
                                                             ----------
                                                             $10,920.25


Contract Value at end of Contract Year                                      $10,920.25
X (1 + Annual Interest Rate)                                                   X 1.045
                                                                            ----------
                                                                            $11,411.66

Contract Value at end of Contract Year                                                    $11,411.66
X (1 + Annual Interest Rate)                                                                 X 1.045
                                                                                          ----------
                                                                                          $11,925.19

Contract Value at end of Contract Year                                                                     $11,925.19
X (1 + Annual Interest Rate)                                                                                 X  1.045
                                                                                                           ----------
Total Interest Credited During Guarantee Period = $2,461.82 ($12,461.82 - $10,000)                         $12,461.82
</TABLE>

This example assumes no withdrawals  during the entire 5 year Guarantee  Period.
If you  were  to  make a  partial  withdrawal,  you  may  be  required  to pay a
withdrawal  charge.  In  addition,  the amount  withdrawn  may be  increased  or
decreased by a Market Value  Adjustment that reflects  changes in interest rates
since the time you invested the amount withdrawn. The hypothetical interest rate
is for illustrative purposes only and is not intended to predict future interest
rates to be declared under the Contract.  Actual interest rates declared for any
given  Guarantee  Period may be more or less than shown  above but will never be
less than the guaranteed minimum rate stated in the Contract.

Renewals.  Prior to the end of each Guarantee  Period, we will mail you a notice
asking you what to do with your money,  including the accrued  interest.  During
the 30-day period after the end of the Guarantee Period, you may:

1)         take no  action.  We will  automatically  apply  your  money to a new
           Guarantee Period of the same length as the expired  Guarantee Period.
           The new Guarantee Period will begin on the day the previous Guarantee
           Period ends. The new interest rate will be our then current  declared
           rate for a Guarantee Period of that length; or

2)         instruct us to apply your money to one or more new Guarantee Periods
           of your choice.  The new Guarantee Period(s) will begin on the day
           the previous Guarantee Period ends. The new interest rate will be
           our then current declared rate for those Guarantee Periods; or

3)         instruct us to transfer all or a portion of your money to one or more
           Variable Sub-Accounts of the Variable Account.  We will effect the
           transfer on the day we receive your instructions.  We will not adjust
           the amount transferred to include a Market Value Adjustment; or

4)         withdraw all or a portion of your money. You may be required to pay a
           withdrawal  charge,  but we will not adjust the amount  withdrawn  to
           include a Market  Value  Adjustment.  You may also be required to pay
           premium taxes and withholding (if  applicable).  The amount withdrawn
           will  be  deemed  to have  been  withdrawn  on the  day the  previous
           Guarantee Period ends. Amounts not withdrawn will be applied to a new
           Guarantee Period of the same length as the previous Guarantee Period.
           The new Guarantee Period will begin on the day the previous Guarantee
           Period ends.

Market Value Adjustment All withdrawals in excess of the Free Withdrawal Amount,
and transfers from a Guarantee Period,  other than those taken during the 30 day
period  after  a  Guarantee  Period  expires,  are  subject  to a  Market  Value
Adjustment.  A Market  Value  Adjustment  also may apply upon payment of a death
benefit (a Market Value Adjustment made upon payment of a death benefit would be
positive)  and when you apply  amounts  currently  invested in this option to an
Income  Plan  (unless  paid or  applied  during  the  30-day  period  after such
Guarantee  Period  expires).  We will not apply a Market Value  Adjustment  to a
withdrawal you make:


o within the Free  Withdrawal  Amount as  described on page 23,
o as part of the Dollar Cost Averaging Program,
o when exercising the confinement,  unemployment, widow  withdrawals  or
  terminal  illness  waivers,  or
o to satisfy IRS minimum distribution rule for the Contract.


We apply the Market Value  Adjustment to reflect  changes in interest rates from
the time  you  first  allocate  money to a  Guarantee  Period  to the time it is
removed from that Guarantee  Period. We calculate the Market Value Adjustment by
comparing the Treasury  Rate for a period equal to the  Guarantee  Period at its
inception to the Treasury Rate for a period equal to the  Guarantee  Period when
you remove your money.  "Treasury  Rate" means the U.S.  Treasury  Note Constant
Maturity Yield as reported in Federal Reserve Bulletin Release H.15.


<PAGE>

The Market Value Adjustment may be positive or negative, depending on changes in
interest rates. As such, you bear the investment risk associated with changes in
interest  rates.  If interest  rates  increase  significantly,  the Market Value
Adjustment and any withdrawal charge,  premium taxes, and income tax withholding
(if applicable) could reduce the amount you receive upon full withdrawal of your
Contract Value to an amount that is less than the purchase payment plus interest
at the minimum guaranteed interest rate under the Contract.

Generally,  if the original  Treasury  Rate at the time you allocate  money to a
Guarantee  Period is higher than the applicable  current Treasury Rate, then the
Market  Value  Adjustment  will  result  in a  higher  amount  payable  to  you,
transferred, or applied to an Income Plan. Conversely, if the Treasury

Rate  at the  time we  established  the  Guarantee  Period  is  lower  than  the
applicable  current  Treasury Rate, then the Market Value Adjustment will result
in a lower amount payable to you, transferred, or applied to an Income Plan.

For  example,  assume  that you  purchase a  Contract  and you select an initial
Guarantee  Period of 5 years and the 5 year  Treasury  Rate for that duration is
4.50%. Assume that at the end of 3 years, you make a partial withdrawal.  If, at
that later time,  the  current 5 year  Treasury  Rate is 4.20%,  then the Market
Value  Adjustment  will be  positive,  which will  result in an  increase in the
amount payable to you. Conversely, if the current 5 year Treasury Rate is 4.80%,
then the Market  Value  Adjustment  will be  negative,  which  will  result in a
decrease in the amount payable to you.

The formula for calculating  Market Value Adjustments is set forth in Appendix B
to this prospectus,  which also contains  additional examples of the application
of the Market Value Adjustment.

<PAGE>

INVESTMENT ALTERNATIVES:  Transfers
- ------------------------------------------------------------------------------
TRANSFERS DURING THE ACCUMULATION PHASE

During  the  Accumulation  Phase,  you may  transfer  Contract  Value  among the
investment  alternatives.  Transfers  are not  permitted  into the 6 or 12 Month
Dollar Cost Averaging  Options.  You may request  transfers in writing on a form
that we provide or by telephone  according  to the  procedure  described  below.
There is no minimum transfer amount. We currently do not assess, but reserve the
right to assess,  a $10  charge on each  transfer  in excess of 12 per  Contract
Year.  We treat  transfers  to or from more than one Fund on the same day as one
transfer.

We will process transfer  requests that we receive before 3:00 p.m. Central Time
on any Valuation Date using the Accumulation  Unit Values for that Date. We will
process  requests  completed  after 3:00 p.m.  on any  Valuation  Date using the
Accumulation Unit Values for the next Valuation Date. The Contract permits us to
defer  transfers from the Fixed Account Options for up to 6 months from the date
we receive  your  request.  If we decide to  postpone  transfers  from any Fixed
Account  Option  for 30 days or  more,  we will  pay  interest  as  required  by
applicable  law.  Any  interest  would be payable  from the date we receive  the
transfer request to the date we make the transfer.

If you  transfer an amount from a Guarantee  Period other than during the 30 day
period after a Guarantee Period expires, we will increase or decrease the amount
by a Market Value Adjustment.

We reserve the right to waive any transfer restrictions.

TRANSFERS DURING THE PAYOUT PHASE

During the Payout Phase, you may make transfers among the Variable  Sub-Accounts
to change the  relative  weighting of the  Variable  Sub-Accounts  on which your
variable  income  payments will be based.  In addition,  you will have a limited
ability  to make  transfers  from the  Variable  Sub-Accounts  to  increase  the
proportion of your income payments consisting of fixed income payments.  You may
not,  however,  convert any of your fixed income  payments into variable  income
payments.

You may not make any  transfers  for the first 6 months  after the Payout  Start
Date. Thereafter, you may make transfers among the Variable Sub-Accounts or make
transfers  from the Variable  Sub-Accounts  to increase the  proportion  of your
income payments  consisting of fixed income payments.  Your transfers must be at
least 6 months apart.

TELEPHONE TRANSFERS

You may make transfers by telephone by calling 1-800-776-6978.  The cut off time
for telephone transfer requests is 3:00 p.m. Central Time. In the event that the
New York Stock Exchange closes early, i.e., before 3:00 p.m. Central Time, or in
the event that the  Exchange  closes early for a period of time but then reopens
for trading on the same day, we will process  telephone  transfer requests as of
the close of the Exchange on that particular  day. We will not accept  telephone
requests  received at any telephone number other than the number that appears in
this paragraph or received after the close of trading on the Exchange.

We may suspend, modify or terminate the telephone transfer privilege at any time
without notice.

We use  procedures  that  we  believe  provide  reasonable  assurance  that  the
telephone transfers are genuine.  For example,  we tape telephone  conversations
with  persons  purporting  to  authorize   transfers  and  request   identifying
information.  Accordingly,  we disclaim any liability for losses  resulting from
allegedly  unauthorized  telephone  transfers.   However,  if  we  do  not  take
reasonable steps to help ensure that a telephone  authorization is valid, we may
be liable for such losses.

EXCESSIVE TRADING LIMITS

For  Contracts  issued on or after May 1, 1999,  we  reserve  the right to limit
transfers in any Contract Year, or to refuse any transfer request for a Contract
owner or certain Contract owners, if:

o    we believe, in our sole discretion, that excessive trading by such Contract
     owner or  owners,  or a  specific  transfer  request  or group of  transfer
     requests,  may have a detrimental effect on the Accumulation Unit Values of
     any Variable  Sub-Account or the share prices of the corresponding Funds or
     would be to the disadvantage of other Contract owners; or

o    we are informed by one or more of the corresponding  Funds that they intend
     to restrict the purchase or redemption of Fund shares  because of excessive
     trading or because  they  believe  that a  specific  transfer  or groups of
     transfers would have a detrimental effect on the prices of Fund shares.

We may apply the  restrictions  in any  manner  reasonably  designed  to prevent
transfers that we consider disadvantageous to other Contract owners.

<PAGE>

DOLLAR COST AVERAGING PROGRAM

You may make transfers  automatically through dollar cost averaging prior to the
Payout  Start  Date.  There  are three  different  ways to use the  Dollar  Cost
Averaging Program:

1)   You may allocate  purchase  payments to the Fixed  Account  Options for
the specific purpose of dollar cost averaging.

2) You may dollar cost  average out of any Variable  Sub-account  into any other
Variable Sub-account(s).

3) You may transfer interest credited from a Guarantee Period(s) to any Variable
Sub-account without application of a Market Value Adjustment.

We will not charge a transfer fee for  transfers  made under this  Program,  nor
will such  transfers  count  against the 12 transfers you can make each Contract
Year without paying a transfer fee.

The theory of dollar cost averaging is that if purchases of equal dollar amounts
are made at fluctuating prices, the aggregate average cost per unit will be less
than  the  average  of the unit  prices  on the same  purchase  dates.  However,
participation  in this Program does not assure you of a greater profit from your
purchases under the Program nor will it prevent or necessarily  reduce losses in
a declining market.

AUTOMATIC FUND REBALANCING PROGRAM

Once  you have  allocated  your  money  among  the  Variable  Sub-Accounts,  the
performance  of  each  Sub-Account  may  cause  a shift  in the  percentage  you
allocated to each  Sub-Account.  If you select our  Automatic  Fund  Rebalancing
Program,  we will  automatically  rebalance the Contract  Value in each Variable
Sub-Account  and  return it to the  desired  percentage  allocations.  Money you
allocate to the Fixed Account will not be included in the rebalancing.

We will rebalance your account each quarter according to your  instructions.  We
will transfer amounts among the Variable  Sub-Accounts to achieve the percentage
allocations  you  specify.  You  can  change  your  allocations  at any  time by
contacting us in writing or by telephone.  The new allocation  will be effective
with the  first  rebalancing  that  occurs  after we  receive  your  written  or
telephone  request.  We are not responsible for rebalancing that occurs prior to
receipt of proper notice of your request.

Example:

           Assume  that you want your  initial  purchase  payment  split among 2
           Variable Sub-Accounts. You want 40% to be in the AIM V.I. Diversified
           Income  Variable  Sub-Account  and 60% to be in the AIM  V.I.  Growth
           Variable  Sub-Account.  Over the next 2 months the bond  market  does
           very well while the stock market performs  poorly.  At the end of the
           first quarter,  the AIM V.I.  Diversified Income Variable Sub-Account
           now represents 50% of your holdings because of its increase in value.
           If you  choose to have your  holdings  rebalanced  quarterly,  on the
           first day of the next quarter we would sell some of your units in the
           AIM V.I. Diversified Income Variable Sub-Account and use the money to
           buy more units in the AIM V.I.  Growth  Variable  Sub-Account so that
           the percentage allocations would again be 40% and 60% respectively.

The Automatic Fund Rebalancing Program is available only during the Accumulation
Phase.  The  transfers  made  under  the  Program  do not count  towards  the 12
transfers  you can make without  paying a transfer fee, and are not subject to a
transfer fee.

Fund  rebalancing is consistent with  maintaining your allocation of investments
among market  segments,  although it is  accomplished  by reducing your Contract
Value allocated to the better performing segments.

<PAGE>

EXPENSES
- -------------------------------------------------------------------------------
As a Contract  owner,  you will bear,  directly or  indirectly,  the charges and
expenses described below.

CONTRACT MAINTENANCE CHARGE

During the Accumulation  Phase, on each Contract  Anniversary,  we will deduct a
$35  contract  maintenance  charge  from your  Contract  Value  invested in each
Variable  Sub-Account  in proportion to the amount  invested.  During the Payout
Phase, we will deduct the charge proportionately from each income payment.


The charge is to compensate us for the cost of  administering  the Contracts and
the Variable Account.  Maintenance costs include expenses we incur in processing
purchase payments;  keeping records;  processing death claims, cash withdrawals,
and policy changes; proxy statements;  calculating  Accumulation Unit Values and
income payments; and issuing reports to Contract owners and regulatory agencies.
We cannot increase the charge. We will waive this charge if:


o        total purchase payments equal $50,000 or more, or

o        all money is allocated  to the Fixed  Account  Options,  as of the
         Contract Anniversary.

After the Payout  Start  Date,  we will  waive this  charge if, as of the Payout
Start Date:


o        the Contract Value is $50,000 or more, or

o        all income payments are fixed amount income payments.

If you  surrender  your  Contract,  we will deduct a full  contract  maintenance
charge unless your Contract qualifies for a waiver.


MORTALITY AND EXPENSE RISK CHARGE


We deduct a mortality  and expense  risk charge daily at an annual rate of 1.00%
of the average daily net assets you have  invested in the Variable  Sub-Accounts
(1.20% if you select the Enhanced Death Benefit  Rider,  and 1.40% if you select
the Enhanced  Death and Income  Benefit  Combination  Rider).  The mortality and
expense  risk  charge  is for all the  insurance  benefits  available  with your
Contract (including our guarantee of annuity rates and the death benefits),  for
certain expenses of the Contract,  and for assuming the risk (expense risk) that
the  current  charges  will be  sufficient  in the  future  to cover the cost of
administering  the  Contract.   If  the  charges  under  the  Contract  are  not
sufficient,  then Glenbrook will bear the loss. We charge additional amounts for
the enhanced  death benefit and Enhanced  Death and Income  Benefit  Combination
riders to compensate us for the additional risk that we accept by providing each
rider.


We guarantee the mortality and expense risk charge and we cannot increase it. We
assess the mortality and expense risk charge during both the Accumulation  Phase
and the Payout Phase.

ADMINISTRATIVE EXPENSE CHARGE

We deduct an  administrative  expense charge daily at an annual rate of 0.10% of
the average daily net assets you have invested in the Variable Sub-Accounts.  We
intend  this  charge to cover  actual  administrative  expenses  that exceed the
revenues  from  the  contract   maintenance   charge.   There  is  no  necessary
relationship  between  the amount of  administrative  charge  imposed on a given
Contract and the amount of expenses that may be  attributable  to that Contract.
We assess  this  charge  each day during the  Accumulation  Phase and the Payout
Phase. We guarantee that we will not raise this charge.

TRANSFER FEE

We  do  not  currently   impose  a  fee  upon  transfers  among  the  investment
alternatives. However, we reserve the right to charge $10 per transfer after the
12th  transfer  in each  Contract  Year.  We will not charge a  transfer  fee on
transfers  that are part of a Dollar Cost  Averaging  Program or Automatic  Fund
Rebalancing Program.

WITHDRAWAL CHARGE


We may assess a  withdrawal  charge of up to 7% of the purchase  payment(s)  you
withdraw.  The charge  declines  to 0% after 7  complete  years from the date we
received the purchase payment being withdrawn. A schedule showing how the charge
declines  appears on page 7, above.  During each Contract Year, you can withdraw
up to 15% of the  Contract  Value  as of the  beginning  of that  Contract  Year
without paying the charge.  Unused portions of this 15% "Free Withdrawal Amount"
are not carried forward to future Contract Years.

We will deduct  withdrawal  charges,  if  applicable,  from the amount paid. For
purposes of the withdrawal  charge, we will treat withdrawals as coming from the
oldest  purchase  payments  first.  However,  for federal  income tax  purposes,
earnings  are  considered  to come out first,  which  means you pay taxes on the
earnings portion of your withdrawal.

<PAGE>

We do not apply a withdrawal charge in the following situations:

o    on the  Payout  Start Date (a  withdrawal  charge may apply if you elect to
     receive income payments for a specified period of less than 120 months);


o    the death of the  Contract  owner or Annuitant (unless the settlement
     value is used);


o    withdrawals  taken  to  satisfy  IRS  minimum  distribution  rules  for
     the Contract; or

o    withdrawals that qualify for one of the waivers described below.

We use the amounts obtained from the withdrawal  charge to pay sales commissions
and other  promotional or  distribution  expenses  associated with marketing the
Contracts.  To the extent  that the  withdrawal  charge does not cover all sales
commissions and other  promotional or distribution  expenses,  we may use any of
our  corporate  assets,  including  potential  profit  which may arise  from the
mortality and expense risk charge or any other  charges or fee described  above,
to make up any difference.

Withdrawals  also may be  subject  to tax  penalties  or income tax and a Market
Value Adjustment.  You should consult your own tax counsel or other tax advisers
regarding any withdrawals.

Confinement  Waiver.  We will waive the  withdrawal  charge and any Market Value
Adjustment  on all  withdrawals  taken prior to the Payout Start Date under your
Contract if the following conditions are satisfied:

         1) you, or the  Annuitant  if the  Contract  is owned by a  non-natural
         person,  are first  confined to a long term care facility or a hospital
         (as defined in the Contract) for at least 90  consecutive  days. You or
         the  Annuitant  must enter the long term care  facility  or hospital at
         least 30 days after the Issue Date;

         2) we must receive your  request for the  withdrawal  and due proof (as
         defined in the  Contract)  of the stay no later than 90 days  following
         the end of your or the Annuitant's  stay at the long term care facility
         or hospital; and

         3)   a physician  must have  prescribed  the stay and the stay must be
         medically necessary (as defined in the Contract).

You may not claim this benefit if you, or the Annuitant,  or a member of your or
the Annuitant's immediate family (as defined in the Contract),  is the physician
prescribing your or the Annuitant's stay in a long term care facility.

Terminal  Illness  Waiver.  We will waive the  withdrawal  charge and any Market
Value  Adjustment on all withdrawals  taken prior to the Payout Start Date under
your Contract if:

       1) you (or the Annuitant if the Contract owner is not a natural person)
       are first  diagnosed by a physician (we may require a second or a third
       opinion) with a terminal  illness (as defined in the Contract) at least
       30 days after the Issue Date; and

       2) you claim this benefit and deliver adequate proof of diagnosis to us.

Unemployment  Waiver.  We will waive the withdrawal  charge and any Market Value
Adjustment on one partial or a full  withdrawal  taken prior to the Payout Start
Date under your Contract, if you meet the following requirements:

       1) you or the Annuitant become unemployed at least one year after the
       Issue Date;

       2) you or the Annuitant have been granted unemployment compensation (as
       defined  in the  Contract)  for at least  30 days as a  result  of that
       unemployment  and we  receive  due proof  thereof  (as  defined  in the
       Contract) prior to or at the time of the withdrawal request; and

       3) you or the Annuitant  exercise this benefit  within 180 days of your
       or the Annuitant's initial receipt of unemployment compensation.

You may exercise this benefit once during the life of your Contract. This waiver
applies upon the unemployment of the Annuitant only if the Contract owner is not
a natural person.

Please refer to your Contract for more detailed  information about the terms and
conditions of these waivers.


The laws of your state may limit the  availability of these waivers and may also
change certain terms and/or  benefits  available  under the waivers.  You should
consult your Contract for further details on these variations. Also, even if you
are not required to pay our  withdrawal  charge  because of these  waivers,  you
still may be required to pay taxes or tax penalties on the amount withdrawn. You
should  consult your tax adviser to determine the effect of a withdrawal on your
taxes.

<PAGE>

PREMIUM TAXES

Some  states  and other  governmental  entities  (e.g.,  municipalities)  charge
premium taxes or similar taxes.  We are  responsible  for paying these taxes and
will deduct them from your Contract Value.  Some of these taxes are due when the
Contract is issued, others are due when income payments begin or upon surrender.
Our  current  practice  is not to charge  anyone for these  taxes  until  income
payments begin or when a total withdrawal occurs,  including payment upon death.
We may discontinue this practice sometime in the future and deduct premium taxes
from  the  purchase  payments.  Premium  taxes  generally  range  from 0% to 4%,
depending on the state.


At the Payout Start Date, if applicable,  we deduct the charge for premium taxes
from each  investment  alternative in the proportion  that the Contract  owner's
value in the investment alternative bears to the total Contract Value.


DEDUCTION FOR SEPARATE ACCOUNT INCOME TAXES

We are not currently maintaining a provision for taxes. In the future,  however,
we may establish a provision for taxes if we determine,  in our sole discretion,
that we will incur a tax as a result of the  operation of the Variable  Account.
We will  deduct  for any  taxes we incur as a  result  of the  operation  of the
Variable  Account,  whether or not we previously  made a provision for taxes and
whether or not it was sufficient.  Our status under the Internal Revenue Code is
briefly described in the Statement of Additional Information.

OTHER EXPENSES

Each  Fund  deducts  advisory  fees and  other  expenses  from its  assets.  You
indirectly  bear the charges and  expenses of the Fund whose  shares are held by
the  Variable  Sub-Accounts.  These  fees  and  expenses  are  described  in the
accompanying  prospectus  for the Funds.  For a summary of current  estimates of
those charges and  expenses,  see pages 8-9 above.  We may receive  compensation
from A I M Advisors, Inc., for administrative services we provide to the Funds.

<PAGE>

ACCESS TO YOUR MONEY
- ------------------------------------------------------------------------------
You can  withdraw  some or all of your  Contract  Value at any time prior to the
Payout Start Date. Withdrawals also are available under limited circumstances on
or after the Payout Start Date. See "Income Plans" on page 27.

The amount payable upon  withdrawal is the Contract Value next computed after we
receive the request for a withdrawal at our headquarters, adjusted by any Market
Value Adjustment,  less any withdrawal charges,  contract  maintenance  charges,
income  tax  withholding,  penalty  tax,  and any  premium  taxes.  We will  pay
withdrawals  from the Variable  Account within 7 days of receipt of the request,
subject to postponement in certain circumstances.

You can withdraw money from the Variable  Account or the Fixed Account  Options.
To  complete a partial  withdrawal  from the  Variable  Account,  we will cancel
Accumulation  Units in an  amount  equal to the  withdrawal  and any  applicable
withdrawal charge and premium taxes.

You  must  name  the  investment  alternative  from  which  you are  taking  the
withdrawal.  If none is named,  then the  withdrawal  request is incomplete  and
cannot be honored.

In general,  you must  withdraw at least $50 at a time.  You also may withdraw a
lesser  amount  if you  are  withdrawing  your  entire  interest  in a  Variable
Sub-Account.


If you request a total withdrawal, we may require you to return your Contract to
us. We also will  deduct a contract  maintenance  charge of $35,  unless we have
waived the contract maintenance charge on your Contract.


POSTPONEMENT OF PAYMENTS

We may postpone the payment of any amounts due from the Variable  Account  under
the Contract if:

1) The New York  Stock  Exchange  is closed for other  than  usual  weekends  or
holidays, or trading on the Exchange is otherwise restricted;

2)   An emergency exists as defined by the SEC; or

3)   The SEC permits delay for your protection.

In addition,  we may delay payments or transfers from the Fixed Account  Options
for up to 6 months or shorter  period if required by law. If we delay payment or
transfer  for 30 days or more,  we will pay  interest as  required  by law.  Any
interest would be payable from the date we receive the withdrawal request to the
date we make the payment or transfer.

SYSTEMATIC WITHDRAWAL PROGRAM

You  may  choose  to  receive  systematic  withdrawal  payments  on  a  monthly,
quarterly,  semi-annual,  or annual  basis at any time prior to the Payout Start
Date.  The  minimum  amount  of  each  systematic  withdrawal  is  $50.  At  our
discretion,  systematic  withdrawals may not be offered in conjunction  with the
Dollar Cost Averaging or Automatic Fund Rebalancing Programs.

Depending  on  fluctuations  in the value of the Variable  Sub-Accounts  and the
value of the Fixed Account,  systematic  withdrawals  may reduce or even exhaust
the Contract  Value.  Income taxes may apply to systematic  withdrawals.  Please
consult your tax advisor before taking any withdrawal.

We will make systematic  withdrawal payments to you or your designated payee. We
may modify or suspend the Systematic  Withdrawal Program and charge a processing
fee for the service. If we modify or suspend the Systematic  Withdrawal Program,
existing systematic withdrawal payments will not be affected.

MINIMUM CONTRACT VALUE


If your request for a partial withdrawal would reduce the Contract Value to less
than  $1,000,  we may treat it as a request to  withdraw  your  entire  Contract
Value.  Your Contract will terminate if you withdraw all of your Contract Value.
We will, however,  ask you to confirm your withdrawal request before terminating
your  Contract.  If we terminate your  Contract,  we will  distribute to you its
Contract  Value,  adjusted  by any  applicable  Market  Value  Adjustment,  less
withdrawal and other charges, and taxes.


<PAGE>

INCOME PAYMENTS
- ------------------------------------------------------------------------------
PAYOUT START DATE


You select the Payout Start Date in your  application.  The Payout Start Date is
the day  that we  apply  your  Contract  Value,  adjusted  by any  Market  Value
Adjustment  and less any applicable  taxes,  to an Income Plan. The Payout Start
Date must be no later than the Annuitant's  90th birthday,  or the 10th Contract
Anniversary, if later.


You may change the Payout  Start Date at any time by  notifying us in writing of
the change at least 30 days before the  scheduled  Payout  Start Date.  Absent a
change, we will use the Payout Start Date stated in your Contract.

INCOME PLANS


An  "Income  Plan" is a series of  payments  on a  scheduled  basis to you or to
another  person  designated  by you.  You may choose and change  your  choice of
Income Plan until 30 days before the Payout Start Date.  If you do not select an
Income Plan, we will make income  payments in accordance with Income Plan 1 with
guaranteed  payments for 10 years. After the Payout Start Date, you may not make
withdrawals (except as described below) or change your choice of Income Plan.


Three  Income  Plans are  available  under the  Contract.  Each is  available to
provide:

o        fixed income payments;
o        variable income payments; or
o        a combination of the two.

The three Income Plans are:

       Income Plan 1 -- Life Income with Guaranteed Payments.
       Under this plan, we make periodic income payments for at least as
       long as the Annuitant lives.  If the Annuitant dies before we have made
       all of the guaranteed  income payments,  we will continue to pay the
       remainder  of the  guaranteed  income  payments  as  required  by the
       Contract.

       Income Plan 2 - Joint and Survivor Life Income with Guaranteed Payments.
       Under this plan, we make periodic income payments for at least as long
       as either the Annuitant or the joint Annuitant is alive.  If both the
       Annuitant and the joint Annuitant die before we have made all of the
       guaranteed income payments, we will continue to pay the remainder of the
       guaranteed income payments as required by the Contract.


       Income Plan 3 -- Guaranteed  Payments for a Specified Period (5 Years
       to 30 Years).  Under this plan, we make periodic  income payments for
       the  period  you have  chosen.  These  payments  do not depend on the
       Annuitant's  life.  Income  payments  for less than 120 months may be
       subject to a  withdrawal  charge.  We will deduct the  mortality  and
       expense  risk  charge  from the  Variable  Sub-Account  assets  which
       support  variable  income  payments  even  though  we do not bear any
       mortality risk.


The length of any  guaranteed  payment  period under your  selected  Income Plan
generally  will affect the dollar amounts of each income  payment.  As a general
rule, longer guarantee periods result in lower income payments, all other things
being equal. For example, if you choose an Income Plan with payments that depend
on the life of the Annuitant but with no minimum specified period for guaranteed
payments, the income payments generally will be greater than the income payments
made under the same Income Plan with a minimum  specified  period for guaranteed
payments.

If you choose  Income Plan 1 or 2, or, if  available,  another  Income Plan with
payments that continue for the life of the Annuitant or joint Annuitant,  we may
require proof of age and sex of the Annuitant or joint Annuitant before starting
income payments, and proof that the Annuitant or joint Annuitant is alive before
we make each payment.  Please note that under such Income Plans, if you elect to
take no minimum guaranteed payments, it is possible that the payee could receive
only 1 income  payment if the Annuitant and any joint  Annuitant both die before
the second  income  payment,  or only 2 income  payments  if they die before the
third income payment, and so on.


Generally,  you may not make  withdrawals  after  the  Payout  Start  Date.  One
exception to this rule applies if you are  receiving  variable  income  payments
that do not depend on the life of the  Annuitant  (such as under Income Plan 3).
In that case you may  terminate  the  Variable  Account  portion  of the  income
payments at any time and  receive a lump sum equal to the  present  value of the
remaining  variable  payments due. A withdrawal charge may apply. We also deduct
applicable premium taxes from the Contract Value at the Payout Start Date.


We may make other Income Plans available.  You may obtain information about them
by writing or calling us.
<PAGE>

You may  apply all or part of your  Contract  Value to an  Income  Plan.  If you
elected the Enhanced Death and Income Benefit Combination Rider, you may be able
to apply an amount greater than your Contract Value. You must apply at least the
Contract  Value in the Fixed  Account  Options on the Payout Start Date to fixed
income  payments.  If you wish to apply any portion of your Fixed Account Option
balance to provide variable income payments,  you should plan ahead and transfer
that amount to the Variable  Sub-Accounts prior to the Payout Start Date. If you
do not tell us how to allocate  your  Contract  Value  among fixed and  variable
income  payments,  we will apply your Contract Value in the Variable  Account to
variable income payments and your Contract Value in the Fixed Account Options to
fixed income payments.


We will apply your Contract Value,  adjusted by a Market Value Adjustment,  less
applicable  taxes to your Income Plan on the Payout Start Date.  If the Contract
Value is less than  $2,000 or not enough to  provide  an  initial  payment of at
least $20, and state law permits, we may:


o    pay you the  Contract  Value,  adjusted  by any  Market  Value  Adjustment
     and less any  applicable  taxes,  in a lump sum instead of the periodic
     payments you have chosen, or

o    reduce the frequency of your payments so that each payment will be at
     least $20.

VARIABLE INCOME PAYMENTS

The amount of your variable income payments depends upon the investment  results
of the Variable  Sub-Accounts you select, the premium taxes you pay, the age and
sex of the  Annuitant,  and the Income Plan you choose.  We  guarantee  that the
payments  will not be affected by (a) actual  mortality  experience  and (b) the
amount of our administration expenses.

We cannot  predict  the total  amount of your  variable  income  payments.  Your
variable income  payments may be more or less than your total purchase  payments
because (a) variable  income  payments vary with the  investment  results of the
underlying  Funds and (b) the  Annuitant  could live  longer or shorter  than we
expect based on the tables we use.


In calculating the amount of the periodic  payments in the annuity tables in the
Contract,  we  assumed  an  annual  investment  rate of 3%.  If the  actual  net
investment  return of the  Variable  Sub-Accounts  you  choose is less than this
assumed investment rate, then the dollar amount of your variable income payments
will decrease. The dollar amount of your variable income payments will increase,
however,  if the actual net  investment  return  exceeds the assumed  investment
rate. The dollar amount of the variable  income  payments stays level if the net
investment  return  equals the  assumed  investment  rate.  Please  refer to the
Statement of Additional  Information for more detailed  information as to how we
determine  variable income payments.  We reserve the right to make other assumed
investments rates available under this contract.


FIXED INCOME PAYMENTS

We guarantee  income payment  amounts  derived from any Fixed Account Option for
the duration of the Income Plan. We calculate the fixed income payments by:

1) adjusting the portion of the Contract  Value in any Fixed  Account  Option on
the Payout Start Date by any applicable Market Value Adjustment;

2)   deducting any applicable premium tax; and

3) applying the  resulting  amount to the greater of (a) the  appropriate  value
from the income payment table in your Contract or (b) such other value as we are
offering at that time.

We may defer making fixed income payments for a period of up to 6 months or such
shorter  times as state law may  require.  If we defer  payments  for 30 days or
more,  we will pay  interest  as  required  by law from the date we receive  the
withdrawal request to the date we make payment.

CERTAIN EMPLOYEE BENEFIT PLANS

The Contracts  offered by this  prospectus  contain  income  payment tables that
provide  for  different  payments  to men and women of the same  age,  except in
states that require  unisex  tables.  We reserve the right to use income payment
tables that do not  distinguish  on the basis of sex to the extent  permitted by
law. In certain employment-related situations,  employers are required by law to
use the same  income  payment  tables  for men and  women.  Accordingly,  if the
Contract is to be used in connection  with an  employment-related  retirement or
benefit plan and we do not offer unisex annuity tables in your state, you should
consult  with  legal  counsel  as to  whether  the  purchase  of a  Contract  is
appropriate.

<PAGE>

DEATH BENEFITS
- ------------------------------------------------------------------------------
We will pay a death benefit if, prior to the Payout Start Date:

1)   any Contract owner dies or,
2)   the  Annuitant  dies,  if the Contract is owned by a company or other
     legal entity.


We  will  pay  the  death  benefit  to the  new  Contract  owner  as  determined
immediately  after  the  death.  The new  Contract  owner  would be a  surviving
Contract  owner or, if none, the  Beneficiary(ies).  In the case of the death of
the Annuitant, we will pay the death benefit to the current Contract Owner.


DEATH BENEFIT AMOUNT

Prior to the Payout Start Date, the death benefit is equal to the greatest of:

1)   the Contract Value as of the date we determine the death benefit, or

2) the  Settlement  Value (that is, the amount  payable on a full  withdrawal of
Contract Value) on the date we determine the death benefit, or

3)   the sum of all purchase payments reduced by a withdrawal adjustment, as
defined below, or

4) the Contract  Value on each Death  Benefit  Anniversary  prior to the date we
determine  the death  benefit,  increased by purchase  payments  made since that
Death  Benefit  Anniversary  and reduced by a withdrawal  adjustment  as defined
below.

A "Death Benefit  Anniversary" is every seventh Contract  Anniversary during the
Accumulation Phase. For example, the 7th, 14th, and 21st Contract  Anniversaries
are the first three Death Benefit Anniversaries.

The  "withdrawal  adjustment"  is equal to (a)  divided by (b),  with the result
multiplied by (c), where:

       (a)  is the withdrawal amount;

       (b)  is the Contract Value immediately prior to the withdrawal; and

       (c)  is the value of the applicable death benefit  alternative
            immediately prior to the withdrawal.

A  Market  Value  Adjustment  made  upon  payment  of a death  benefit  would be
positive.


We will  determine the value of the death benefit as of the end of the Valuation
Date on which we receive a complete request for payment of the death benefit. If
we receive a request after 3:00 p.m.  Central Time on a Valuation  Date, we will
process the request as of the end of he following Valuation Date.


ENHANCED DEATH BENEFIT RIDER


For Contract  owners up to an including age 80, the Enhanced Death Benefit Rider
is an optional  benefit  that you may elect.  If you elect the rider,  the death
benefit will be the greater of the death  benefit  alternatives  (1) through (4)
listed above, or (5) the enhanced death benefit.

If the Contract owner is a living individual, the enhanced death benefit applies
only for the death of the Contract  owner. If the Contract owner is not a living
individual,  the  enhanced  death  benefit  applies  only  for the  death of the
Annuitant.  The enhanced death benefit is equal to the greater of Enhanced Death
Benefit A or  Enhanced  Death  Benefit B.  Enhanced  Death  Benefit B may not be
available in all states.


The enhanced  death benefit will never be greater than the maximum death benefit
allowed by any nonforfeiture laws which govern the Contract.

Enhanced  Death  Benefit A. The  Enhanced  Death  Benefit A on the Issue Date is
equal to the initial purchase  payment.  On each Contract  Anniversary,  we will
recalculate  your Enhanced Death Benefit A to equal the greater of your Contract
Value on that date, or the most recently calculated Enhanced Death Benefit A. We
also  will  recalculate  your  Enhanced  Death  Benefit A  whenever  you make an
additional  purchase  payment  or  a  partial  withdrawal.  Additional  purchase
payments  will  increase  the  Enhanced   Death  Benefit  A   dollar-for-dollar.
Withdrawals  will reduce the  Enhanced  Death  Benefit A by an amount equal to a
withdrawal  adjustment  computed  in the manner  described  above  under  "Death
Benefit  Amount." In the absence of any  withdrawals or purchase  payments,  the
Enhanced  Death  Benefit  A will be the  greatest  of all  Contract  Anniversary
Contract Values on or before the date we calculate the death benefit.


We will calculate  Anniversary Values for each Contract Anniversary prior to the
oldest Contract owner's or, if the  Annuitant's,  if the Contract owner is not a
natural person,  the oldest  Annuitant's,  85th birthday.  After age 85, we will
recalculate  the  Enhanced  Death  Benefit  A only  for  purchase  payments  and
withdrawals. The Enhanced Death Benefit A will never be greater than the maximum
death benefit allowed by any non-forfeiture laws which govern the Contract.

<PAGE>

Enhanced  Death  Benefit  B.  The  Enhanced  Death  Benefit  B is equal to total
purchase payments made reduced by a withdrawal adjustment computed in the manner
described  above under "Death  Benefit  Amount." Each purchase  payment and each
withdrawal  adjustment will accumulate daily at a rate equivalent to 5% per year
until the earlier of the date

o    we determine the death benefit, or
o    the first day of the month following the oldest Contract owner's or, if the
     Contract owner is not a natural person, the Annuitant's, 85th birthday.

The  Enhanced  Death  Benefit B will never be  greater  than the  maximum  death
benefit allowed by any non-forfeiture laws which govern the Contract.

ENHANCED DEATH AND INCOME BENEFIT COMBINATION RIDER


Instead of the Enhanced  Death  Benefit  Rider,  for  Contract  Owners up to and
including  age 80,  you  may  choose  the  Enhanced  Death  and  Income  Benefit
Combination Rider.


The enhanced  death  benefit  portion of the Enhanced  Death and Income  Benefit
Combination  Rider is the same as that  described  above under  "Enhanced  Death
Benefit Rider."

The  enhanced  income  benefit  defines a minimum  amount  applied to the Payout
Phase.  This  minimum  amount is equal to what the value of the  enhanced  death
benefit would be on the Payout Start Date.

The enhanced  income  benefit  will apply if the Contract  owner elects a Payout
Start Date that:

o   is on or after the tenth Contract Anniversary, and
o   is prior to the Annuitant's age 90.


On the Payout Start Date, you may apply the greater of the Contract Value or the
enhanced  income  benefit to the Payout Phase of the  Contract.  No Market Value
Adjustment will be applied to the enhanced  income benefit amount.  The enhanced
income  benefit will only apply if the Income Plan  selected  provides  payments
guaranteed for either single or joint life with a period certain of at least:

o  10 years, if the youngest Annuitant's age is 80 or less on the date the
   amount is applied; or

o  5 years, if the youngest Annuitant's age is greater than 80 on the date
   the amount is applied.


If, however, you apply the Contract Value and not the enhanced income benefit to
the Income Plan, then you may select any Income Plan we offer at that time.

A claim for a  distribution  on death must include "Due Proof of Death." We will
accept the following documentation as Due Proof of Death:

o   a certified copy of a death certificate; or

o   a certified copy of a decree of a court of competent jurisdiction as to a
    finding of death; or

o   any other proof acceptable to us.

DEATH BENEFIT PAYMENTS

A death benefit will be paid if:

1) the  Contract  owner  elects to receive the death  benefit  distributed  in a
single payment within 180 days of the date of death, and

2)   the death  benefit is paid as of the day we determine the value of the
death benefit.

Otherwise,  the Settlement Value will be paid. The Settlement Value paid will be
the Settlement Value next computed on or after the requested  distribution  date
for payment, or on the mandatory  distribution date of 5 years after the date of
death,  whichever is earlier. We are currently waiving the 180 day limit, but we
reserve the right to enforce the limitation in the future.

In any event,  the entire value of the  Contract  must be  distributed  within 5
years  after the date of death  unless an Income  Plan is elected or a surviving
spouse continues the Contract in accordance with the provisions described below.


<PAGE>

The Contract owner eligible to receive death benefits has the following options:

1) If the Contract  owner is not a natural  person,  then the Contract owner may
elect to receive the death benefit in one or more distributions.

2) If the Contract  owner is a natural  person,  the Contract owner may elect to
receive the death benefit under an Income Plan or in one or more  distributions.
Payments  from the Income  Plan must begin  within one year of the date of death
and must be payable throughout:

o    the life of the Contract owner; or

o    a period not to exceed the life expectancy of the Contract owner; or

o    the life of the Contract owner with payments guaranteed for a period not to
     exceed the life expectancy of the Contract owner.

       3) If the  surviving  spouse of the  deceased  Contract  owner is the new
       Contract owner, then the spouse may elect one of the options listed above
       or may continue the  Contract in the  Accumulation  Phase as if the death
       had not  occurred.  The  Contract  may  only be  continued  once.  If the
       Contract is continued in the Accumulation Phase, the surviving spouse may
       make a single  withdrawal  of any  amount  within one year of the date of
       death without incurring a withdrawal charge or a Market Value Adjustment.
       On the day the  Contract is  continued,  the  Contract  Value will be the
       death benefit on the Valuation  Date after we receive due proof of death.
       The death benefit of the continued Contract will be the greater of:

       (a)  the sum of all purchase payments reduced by a withdrawal adjustment,
       as defined in the death benefit provision, or

       (b)  the Contract Value on the date we determine the death benefit.




<PAGE>

MORE INFORMATION
- ------------------------------------------------------------------------------
GLENBROOK

Glenbrook is the issuer of the  Contract.  Glenbrook  is a stock life  insurance
company  organized  under the laws of the State of Arizona in 1998.  Previously,
Glenbrook  was  organized  under  the  laws of the  State of  Illinois  in 1992.
Glenbrook  was  originally  organized  under the laws of the State of Indiana in
1965.  From 1965 to 1983 Glenbrook was known as "United  Standard Life Assurance
Company"  and from 1983 to 1992 as  "William  Penn  Life  Assurance  Company  of
America."

Glenbrook is  currently  licensed to operate in the District of Columbia and all
states except New York.  We intend to offer the Contract in those  jurisdictions
in which we are  licensed.  Our  headquarters  is located at 3100 Sanders  Road,
Northbrook, Illinois, 60062.


Glenbrook  is a wholly  owned  subsidiary  of Allstate  Life  Insurance  Company
("Allstate Life"), a stock life insurance company incorporated under the laws of
the State of Illinois.  Allstate  Life is a wholly owned  subsidiary of Allstate
Insurance Company,  a stock  property-liability  insurance company  incorporated
under the laws of the State of Illinois. All of the outstanding capital stock of
Allstate Insurance Company is owned by The Allstate Corporation.


Glenbrook and Allstate Life entered into a reinsurance  agreement effective June
5, 1992. Under the reinsurance agreement,  Allstate Life reinsures substantially
all of  Glenbrook's  liabilities  under its  various  insurance  contracts.  The
reinsurance  agreement  provides us with  financial  backing from Allstate Life.
However, it does not create a direct contractual  relationship  between Allstate
Life and you.  In other  words,  the  obligations  of  Allstate  Life  under the
reinsurance agreement are to Glenbrook; Glenbrook remains the sole obligor under
the Contract to you.

Several   independent   rating  agencies   regularly   evaluate  life  insurers'
claims-paying ability, quality of investments,  and overall stability. A.M. Best
Company assigns A+ (Superior) to Allstate Life which automatically reinsures all
net business of Glenbrook.  A.M. Best Company also assigns  Glenbrook the rating
of  A+(r)  because  Glenbrook  automatically  reinsures  all net  business  with
Allstate Life.  Standard & Poor's Insurance Rating Services assigns an AA+ (Very
Strong)  financial  strength  rating  and  Moody's  assigns  an Aa2  (Excellent)
financial strength rating to Glenbrook. Glenbrook shares the same ratings of its
parent,  Allstate Life. These ratings do not reflect the investment  performance
of the Variable Account. We may from time to time advertise these ratings in our
sales literature.

THE VARIABLE ACCOUNT

Glenbrook  established the Glenbrook Life and Annuity Company Separate Account A
on September 6, 1995. We have registered the Variable  Account with the SEC as a
unit investment trust. The SEC does not supervise the management of the Variable
Account or Glenbrook.

We own the assets of the Variable Account.  The Variable Account is a segregated
asset  account  under  Arizona  law.  That  means we  account  for the  Variable
Account's  income,  gains and losses  separately  from the  results of our other
operations.  It also means that only the assets of the Variable Account that are
in excess of the reserves  and other  Contract  liabilities  with respect to the
Variable  Account are subject to liabilities  relating to our other  operations.
Our obligations arising under the Contracts are general corporate obligations of
Glenbrook.


The Variable Account consists of 17 Variable Sub-Accounts, each of which invests
in a corresponding  Fund. We may add new Variable  Sub-Accounts or eliminate one
or more of them,  if we believe  marketing,  tax, or  investment  conditions  so
warrant. We may also add other variable sub-accounts that may be available under
other variable annuity contracts. We do not guarantee the investment performance
of the Variable Account,  its Sub-Accounts or the Funds. We may use the Variable
Account to fund our other annuity contracts. We will account separately for each
type of annuity contract funded by the Variable Account.


THE FUNDS

Dividends and Capital Gain Distributions We automatically reinvest all dividends
and capital  gains  distributions  from the Funds in shares of the  distributing
Funds at their net asset value.

Voting  Privileges As a general  matter,  you do not have a direct right to vote
the  shares of the Funds  held by the  Variable  Sub-Accounts  to which you have
allocated your Contract Value.  Under current law, however,  you are entitled to
give us  instructions on how to vote those shares on certain  matters.  Based on
our  present  view of the law, we will vote the shares of the Funds that we hold
directly  or  indirectly   through  the  Variable  Account  in  accordance  with
instructions  that we  receive  from  Contract  owners  entitled  to  give  such
instructions.

As a general rule,  before the Payout Start Date,  the Contract  owner or anyone
with a voting interest is the person entitled to give voting  instructions.  The
number of shares that a person has a right to  instruct  will be  determined  by
dividing the Contract Value allocated to the applicable Variable  Sub-Account by
the net asset value per share of the corresponding Fund as of the record date of
the meeting.  After the Payout Start Date, the person  receiving income payments
has the voting  interest.  The  payee's  number of votes will be  determined  by
dividing the reserve for such Contract  allocated to the applicable  Sub-account
by the net asset value per share of the  corresponding  eligible Fund. The votes
decrease  as  income  payments  are made and as the  reserves  for the  Contract
decrease.

We will vote shares  attributable  to  Contracts  for which we have not received
instructions, as well as shares attributable to us, in the same proportion as we
vote shares for which we have received instructions, unless we determine that we
may vote such shares in our own discretion. We will apply voting instructions to
abstain  on any item to be voted  upon on a  pro-rata  basis to reduce the votes
eligible to be cast.

We reserve the right to vote Fund shares as we see fit without  regard to voting
instructions   to  the  extent   permitted  by  law.  If  we  disregard   voting
instructions,  we will include a summary of that action and our reasons for that
action in the next semi-annual financial report we send to you.
<PAGE>


Changes in Funds If the shares of any of the Funds are no longer  available  for
investment by the Variable Account or if, in our judgment, further investment in
such shares is no longer  desirable in view of the purposes of the Contract,  we
may eliminate that Fund and  substitute  shares of another  eligible  investment
fund. Any  substitution of securities  will comply with the  requirements of the
1940 Act. We also may add new Variable  Sub-Accounts  that invest in  additional
mutual funds. We will notify you in advance of any change.

Conflicts  of  Interest  The  Funds  sell  their  shares  to  separate  accounts
underlying both variable life insurance and variable  annuity  contracts.  It is
conceivable that in the future it may be unfavorable for variable life insurance
separate  accounts and variable annuity separate  accounts to invest in the same
Fund. The board of directors of the Funds monitors for possible  conflicts among
separate  accounts  buying  shares of the Funds.  Conflicts  could develop for a
variety of reasons.  For example,  differences in treatment  under tax and other
laws or the failure by a separate account to comply with such laws could cause a
conflict.  To eliminate a conflict,  the Funds' board of directors may require a
separate  account to withdraw  its  participation  in a Fund. A Fund's net asset
value could decrease if it had to sell  investment  securities to pay redemption
proceeds to a separate account withdrawing because of a conflict.

THE CONTRACT


Distribution.  Allstate Life Financial Services, Inc. ("ALFS"),  located at 3100
Sanders Road, Northbrook,  Illinois 60062-7154,  serves as principal underwriter
of the Contracts.  ALFS is a wholly owned subsidiary of Allstate Life. ALFS is a
registered  broker  dealer under the  Securities  and  Exchange Act of 1934,  as
amended  ("Exchange  Act"),  and is a  member  of the  National  Association  of
Securities Dealers, Inc.


We will pay commissions to  broker-dealers  who sell the Contracts.  Commissions
paid may vary, but we estimate that the total  commissions  paid on all Contract
sales will not exceed 8% of all purchase  payments (on a present  value  basis).
These commissions are intended to cover  distribution  expenses.  Sometimes,  we
also pay the  broker-dealer  a  persistency  bonus in addition  to the  standard
commissions.  A persistency  bonus is not expected to exceed 1.20%, on an annual
basis, of the Contract Values  considered in connection with the bonus.  Sale of
the Contracts may also count toward incentive  program awards for the registered
representative.  In some states,  Contracts  may be sold by  representatives  or
employees  of banks  which  may be  acting as  broker-dealers  without  separate
registration   under  the  Exchange  Act,   pursuant  to  legal  and  regulatory
exceptions.

Glenbrook does not pay ALFS a commission for distribution of the Contracts.  The
underwriting  agreement  with ALFS provides that we will  reimburse ALFS for any
liability  to Contract  owners  arising out of  services  rendered or  Contracts
issued.

Administration.  We have primary  responsibility  for all  administration of the
Contracts and the Variable Account.  We provide the following administrative
services, among others:

o        issuance of the Contracts;
o        maintenance of Contract owner records;
o        Contract owner services;
o        calculation of unit values;
o        maintenance of the Variable Account; and
o        preparation of Contract owner reports.



We will send you Contract  statements  and  transaction  confirmations  at least
annually.  You should notify us promptly in writing of any address  change.  You
should  read your  statements  and  confirmations  carefully  and  verify  their
accuracy. You should contact us promptly if you have a question about a periodic
statement. We will investigate all complaints and make any necessary adjustments
retroactively,  but you must notify us of a potential  error within a reasonable
time  after  the date of the  questioned  statement.  If you wait too  long,  we
reserve the right to make the  adjustment as of the date that we receive  notice
of the potential error.


We also will provide you with additional periodic and other reports, information
and prospectuses as may be required by federal securities laws.

QUALIFIED PLANS

If you use the Contract with a qualified plan, the plan may impose  different or
additional  conditions  or  limitations  on  withdrawals,  waivers of withdrawal
charges, death benefits, Payout Start Dates, income payments, and other Contract
features.  In addition,  adverse tax  consequences  may result if qualified plan
limits on  distributions  and other  conditions are not met. Please consult your
qualified plan administrator for more information.

LEGAL MATTERS

Freedman,  Levy,  Kroll & Simonds,  Washington,  D.C., has advised  Glenbrook on
certain federal  securities law matters.  All matters of state law pertaining to
the Contracts,  including the validity of the Contracts and Glenbrook's right to
issue such Contracts under state insurance law, have been passed upon by Michael
J. Velotta, General Counsel of Glenbrook.
<PAGE>

YEAR 2000


Glenbrook is heavily  dependent upon complex  computer systems for all phases of
its   operations,   including   customer   service,   and  policy  and  contract
administration.  Since many of  Glenbrook's  older  computer  software  programs
recognize  only the last two digits of the year in any date,  some  software may
have failed to operate  properly in or after the year 1999,  if the software was
not reprogrammed or replaced ("Year 2000 Issue").  Glenbrook  believes that many
of its  counterparties  and suppliers  also had potential Year 2000 Issues which
could affect  Glenbrook.  In 1995,  Allstate  Insurance Company commenced a four
phase plan intended to mitigate  and/or prevent the adverse effects of Year 2000
Issues.  These strategies included normal development and enhancement of new and
existing  systems,  upgrades to operating systems already covered by maintenance
agreements,  and  modifications  to  existing  systems  to make  them  Year 2000
compliant.  The plan also  included  Glenbrook  actively  working with its major
external  counterparties  and suppliers to assess their  compliance  efforts and
Glenbrook's  exposure to them.  Because of the  accuracy  of this plan,  and its
timely completion,  Glenbrook has experienced no material impacts on its results
of operations,  liquidity or financial position due to the Year 2000 issue. Year
2000 costs are expensed as incurred.


<PAGE>

TAXES
- -------------------------------------------------------------------------------
The following discussion is general and is not intended as tax advice. Glenbrook
makes no guarantee  regarding the tax  treatment of any Contract or  transaction
involving a Contract.

Federal,  state,  local and other tax  consequences  of  ownership or receipt of
distributions under an annuity contract depend on your individual circumstances.
If you are concerned about any tax  consequences  with regard to your individual
circumstances, you should consult a competent tax adviser.

Taxation of Annuities in General

Tax  Deferral.  Generally,  you are not taxed on increases  in the Contract
Value until a  distribution  occurs.  This rule applies only where:

       1) the Contract owner is a natural person,

       2) the  investments  of the Variable  Account are  "adequately
       diversified"  according to Treasury  Department  regulations, and

       3) Glenbrook is considered  the owner of the Variable  Account assets for
       federal income tax purposes.

Non-natural  Owners.  As a general rule,  annuity contracts owned by non-natural
persons  such as  corporations,  trusts,  or other  entities  are not treated as
annuity contracts for federal income tax purposes.  The income on such contracts
is taxed as ordinary  income received or accrued by the owner during the taxable
year.  Please see the  Statement of Additional  Information  for a discussion of
several  exceptions  to the  general  rule for  Contracts  owned by  non-natural
persons.

Diversification  Requirements.  For a Contract  to be treated as an annuity  for
federal income tax purposes,  the  investments  in the Variable  Account must be
"adequately  diversified"  consistent with standards  under Treasury  Department
regulations.  If the  investments  in the  Variable  Account are not  adequately
diversified, the Contract will not be treated as an annuity contract for federal
income tax  purposes.  As a result,  the income on the Contract will be taxed as
ordinary  income  received or accrued by the  Contract  owner during the taxable
year.  Although  Glenbrook  does  not  have  control  over  the  Funds  or their
investments, we expect the Funds to meet the diversification requirements.

Ownership Treatment. The IRS has stated that you will be considered the owner of
Variable  Account assets if you possess  incidents of ownership in those assets,
such as the ability to exercise  investment control over the assets. At the time
the diversification  regulations were issued, the Treasury Department  announced
that the regulations do not provide guidance  concerning  circumstances in which
investor  control of separate  account  investments  may cause an investor to be
treated as the owner of the  separate  account.  The  Treasury  Department  also
stated that future  guidance  would be issued  regarding  the extent that owners
could direct  sub-account  investments  without  being  treated as owners of the
underlying assets of the separate account.

Your rights under the Contract are different than those  described by the IRS in
rulings  in which it found that  contract  owners  were not  owners of  separate
account  assets.  For  example,  you have the choice to  allocate  premiums  and
Contract  Values among more  investment  alternatives.  Also, you may be able to
transfer among  investment  alternatives  more  frequently than in such rulings.
These differences could result in you being treated as the owner of the Variable
Account. If this occurs,  income and gain from the Variable Account assets would
be includible in your gross income.  Glenbrook does not know what standards will
be set forth in any  regulations  or rulings which the Treasury  Department  may
issue. It is possible that future standards announced by the Treasury Department
could adversely affect the tax treatment of your Contract.  We reserve the right
to modify the  Contract  as  necessary  to  attempt  to  prevent  you from being
considered the federal tax owner of the assets of the Variable Account. However,
we make no guarantee that such modification to the Contract will be successful.

Taxation of Partial and Full Withdrawals. If you make a partial withdrawal under
a  non-Qualified  Contract,  amounts  received  are  taxable  to the  extent the
Contract Value,  without regard to surrender charges,  exceeds the investment in
the Contract.  The  investment in the Contract is the gross premium paid for the
Contract minus any amounts previously received from the Contract if such amounts
were properly excluded from your gross income. If you make a partial  withdrawal
under a Qualified Contract, the portion of the payment that bears the same ratio
to the total payment that the  investment in the Contract  (i.e.,  nondeductible
IRA  contributions,  after tax  contributions  to qualified  plans) bears to the
Contract  Value,  is excluded  from your income.  If you make a full  withdrawal
under a non-Qualified Contract or a Qualified Contract, the amount received will
be taxable only to the extent it exceeds the investment in the Contract.

"Nonqualified   distributions"   from  Roth  IRAs  are   treated  as  made  from
contributions  first and are  included  in gross  income only to the extent that
distributions exceed contributions. "Qualified distributions" from Roth IRAs are
not included in gross income.  "Qualified  distributions"  are any distributions
made more than 5 taxable years after the taxable year of the first  contribution
to any Roth IRA and which are:

o        made on or after the date the individual attains age 59 1/2,

o        made to a beneficiary after the Contract owner's death,

o        attributable to the Contract owner being disabled, or
o        for a first time home purchase  (first time home purchases are subject
         to a lifetime limit of $10,000).
<PAGE>

If you transfer a non-Qualified Contract without full and adequate consideration
to a person  other  than  your  spouse  (or to a  former  spouse  incident  to a
divorce), you will be taxed on the difference between the Contract Value and the
investment in the Contract at the time of transfer. Except for certain Qualified
Contracts, any amount you receive as a loan under a Contract, and any assignment
or pledge (or agreement to assign or pledge) of the Contract Value is treated as
a withdrawal of such amount or portion.

Taxation of Annuity Payments. Generally, the rule for income taxation of annuity
payments received from a non-Qualified  Contract provides for the return of your
investment in the Contract in equal  tax-free  amounts over the payment  period.
The balance of each payment received is taxable. For fixed annuity payments, the
amount  excluded  from income is determined  by  multiplying  the payment by the
ratio of the  investment  in the Contract  (adjusted  for any refund  feature or
period certain) to the total expected value of annuity  payments for the term of
the Contract.  If you elect variable annuity payments,  the amount excluded from
taxable  income is determined by dividing the  investment in the Contract by the
total number of expected  payments.  The annuity  payments will be fully taxable
after the total amount of the investment in the Contract is excluded using these
ratios.  If you die, and annuity  payments  cease before the total amount of the
investment in the Contract is recovered,  the unrecovered amount will be allowed
as a deduction for your last taxable year.

Taxation of Annuity Death  Benefits.  Death of a Contract owner, or death of the
Annuitant  if the  Contract  is  owned by a  non-natural  person,  will  cause a
distribution  of death  benefits  from a Contract.  Generally,  such amounts are
included in income as follows:

1) if distributed in a lump sum, the amounts are taxed in the same manner as
a full withdrawal, or

2) if  distributed  under an annuity  option,  the amounts are taxed in the same
manner as an annuity payment. Please see the Statement of Additional Information
for more detail on distribution at death requirements.

Penalty Tax on Premature Distributions. A 10% penalty tax applies to the taxable
amount of any premature distribution from a non-Qualified  Contract. The penalty
tax generally  applies to any distribution made prior to the date you attain age
59 1/2. However, no penalty tax is incurred on distributions:

1) made on or after the date the Contract owner attains age 59 1/2; 2) made as a
result of the Contract  owner's death or  disability;  3) made in  substantially
equal periodic  payments over the Contract owner's life or life  expectancy,  4)
made  under an  immediate  annuity,  or 5)  attributable  to  investment  in the
Contract before August 14, 1982.

You should consult a competent tax advisor to determine if any other  exceptions
to the  penalty  apply  to your  situation.  Similar  exceptions  may  apply  to
distributions from Qualified Contracts.

Aggregation of Annuity Contracts.  All non-qualified  deferred annuity contracts
issued by Glenbrook (or its  affiliates)  to the same Contract  owner during any
calendar  year will be  aggregated  and  treated  as one  annuity  contract  for
purposes of determining the taxable amount of a distribution.

Tax Qualified Contracts

Contracts may be used as investments with certain qualified plans such as:

o        Individual Retirement Annuities or Accounts (IRAs) under Section 408
         of the Code;

o        Roth IRAs under Section 408A of the Code;

o        Simplified Employee Pension Plans under Section 408(k) of the Code;

o        Savings  Incentive  Match Plans for Employees  (SIMPLE) Plans under
         Section 408(p) of the Code;

o        Tax Sheltered Annuities under Section 403(b) of the Code;

o        Corporate and Self Employed Pension and Profit Sharing Plans; and

o        State and  Local Government and Tax-Exempt Organization Deferred
         Compensation Plans.


The income on qualified  plan and IRA  investments  is tax deferred and variable
annuities  held by such plans do not receive any  additional  tax deferral.  You
should review the annuity features,  including all benefits and expenses,  prior
to purchasing a variable annuity in a qualified plan or IRA.  Glenbrook reserves
the  right to limit the  availability  of the  Contract  for use with any of the
Qualified Plans listed above. In the case of certain  qualified plans, the terms
of the plans may govern the right to  benefits,  regardless  of the terms of the
Contract.


<PAGE>

Restrictions  Under Section  403(b) Plans.  Section  403(b) of the Code provides
tax-deferred  retirement  savings plans for employees of certain  non-profit and
educational organizations.  Under Section 403(b), any Contract used for a 403(b)
plan  must  provide  that   distributions   attributable  to  salary   reduction
contributions made after December 31, 1988, and all earnings on salary reduction
contributions, may be made only:

1)   on or after the date of employee

o        attains age 591/2,
o        separates from service,dies,
o        becomes disabled, or

2)   on account of hardship (earnings on salary reduction  contributions may
not be distributed on account of hardship).

These  limitations  do not apply to withdrawals  where  Glenbrook is directed to
transfer some or all of Contract Value to another 403(b) plan.

Income Tax Withholding

Glenbrook  is required to  withhold  federal  income tax at a rate of 20% on all
"eligible rollover  distributions"  unless you elect to make a "direct rollover"
of  such  amounts  to an IRA or  eligible  retirement  plan.  Eligible  rollover
distributions  generally  include all  distributions  from Qualified  Contracts,
excluding IRAs, with the exception of:

       1)   required minimum distributions, or

       2)   a series of substantially  equal periodic  payments made over a
            period of at least 10 years, or,

       3)   over the life (joint lives) of the participant (and beneficiary).

Glenbrook  may be  required to withhold  federal and state  income  taxes on any
distributions from non-Qualified  Contracts or Qualified  Contracts that are not
eligible  rollover  distributions,  unless you notify us of your election to not
have taxes withheld.

<PAGE>

ANNUAL REPORTS AND OTHER DOCUMENTS
- ------------------------------------------------------------------------------
Glenbrook's  annual report on Form 10-K for the year ended  December 31, 1999 is
incorporated herein by reference,  which means that it is legally a part of this
prospectus.

After the date of this  prospectus  and before we terminate  the offering of the
securities under this prospectus,  all documents or reports we file with the SEC
under the Exchange Act are also  incorporated  herein by reference,  which means
that they also legally become a part of this prospectus.

Statements in this  prospectus,  or in documents that we file later with the SEC
and that  legally  become a part of this  prospectus,  may  change or  supersede
statements  in  other  documents  that  are  legally  part of  this  prospectus.
Accordingly,  only the  statement  that is changed or replaced will legally be a
part of this prospectus.

We file our  Exchange  Act  documents  and  reports,  including  our  annual and
quarterly reports on Form 10-K and Form 10-Q electronically on the SEC's "EDGAR"
system using the identifying number CIK No. 0000947878.  The SEC maintains a Web
site  that  contains  reports,   proxy  and  information  statements  and  other
information  regarding  registrants that file  electronically  with the SEC. The
address of the site is http://www.sec.gov.  You also can view these materials at
the SEC's Public  Reference  Room at 450 Fifth Street,  N.W.,  Washington,  D.C.
20549.  For more  information on the operations of SEC's Public  Reference Room,
call 1-800-SEC-0330.

If you have  received a copy of this  prospectus,  and would like a free copy of
any  document   incorporated  herein  by  reference  (other  than  exhibits  not
specifically incorporated by reference into the text of such documents),  please
write or call us at or P.O. Box 94039, Palatine, Illinois 60094-4039 (telephone:
1-800-776-6978).

<PAGE>

PERFORMANCE INFORMATION
- ------------------------------------------------------------------------------
We may advertise the performance of the Variable  Sub-Accounts,  including yield
and total  return  information.  Yield  refers  to the  income  generated  by an
investment  in a Variable  Sub-Account  over a specified  period.  Total  return
represents  the  change,  over a  specified  period of time,  in the value of an
investment in a Variable Sub-Account after reinvesting all income distributions.

All performance  advertisements will include, as applicable,  standardized yield
and total return  figures that reflect the deduction of insurance  charges,  the
contract maintenance charge, and withdrawal charge.  Performance  advertisements
also may include  total return  figures that reflect the  deduction of insurance
charges,  but not the contract  maintenance or withdrawal charges. The deduction
of such charges would reduce the  performance  shown.  In addition,  performance
advertisements may include aggregate,  average,  year-by-year, or other types of
total return figures.

Performance  information for periods prior to the inception date of the Variable
Sub-Accounts  will be based on the historical  performance of the  corresponding
Funds  for the  periods  beginning  with the  inception  dates of the  Funds and
adjusted to reflect current  Contract  expenses.  You should not interpret these
figures to reflect actual historical performance of the Variable Account.

We may include in  advertising  and sales  materials  tax  deferred  compounding
charts and other  hypothetical  illustrations that compare currently taxable and
tax  deferred   investment   programs  based  on  selected  tax  brackets.   Our
advertisements  also may compare the  performance  of our Variable  Sub-Accounts
with: (a) certain unmanaged market indices, including but not limited to the Dow
Jones  Industrial  Average,  the Standard & Poor's 500, and the Shearson  Lehman
Bond Index;  and/or (b) other  management  investment  companies with investment
objectives  similar to the underlying  funds being  compared.  In addition,  our
advertisements   may  include  the  performance   ranking  assigned  by  various
publications,  including  the  Wall  Street  Journal,  Forbes,  Fortune,  Money,
Barron's,  Business Week, USA Today, and statistical services,  including Lipper
Analytical  Services  Mutual Fund Survey,  Lipper Annuity and Closed End Survey,
the Variable Annuity Research Data Survey, and SEI.


<PAGE>

EXPERTS
- ------------------------------------------------------------------------------


The financial  statements and related financial  statement schedule of Glenbrook
as of  December  31, 1999 and 1998 and for each of the three years in the period
ended December 31, 1999, which are incorporated  herein by reference,  have been
audited  by  Deloitte & Touche  LLP,  independent  auditors,  as stated in their
report, which are incorporated herein by reference, and are included in reliance
upon the report of such firm given upon their authority as experts in accounting
and auditing.

The financial  statements of the Variable  Account as of December 31, 1999,  and
for each of the periods in the two years then ended that appear in the Statement
of  Additional   Information  have  been  audited  by  Deloitte  &  Touche  LLP,
independent  auditors,  as stated in their report  appearing in the Statement of
Additional  Information,  and are  included in reliance  upon the report of such
firm given upon their authority as experts in accounting and auditing.




<PAGE>

<TABLE>
<CAPTION>


                                                             APPENDIX A
                                      Accumulation Unit Value and Number of Accumulation Units
                                     Outstanding for Each Variable Sub-Account Since Inception

                                                            Basic Policy


<S>                                                                           <C>                <C>

For the years beginning January 1 and ending December 31                      1998               1999

AIM V.I. AGGRESSIVE GROWTH SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $10.561
Accumulation Unit Value, End of Period                                        $10.561            $15.111
Number of Units Outstanding, End of Period                                     50,119            334,924

AIM V.I. BALANCED SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $11.298
Accumulation Unit Value, End of Period                                        $11.298            $13.331
Number of Units Outstanding, End of Period                                     67,315            626,980

AIM V.I. BLUE CHIP SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -            -

AIM V.I. CAPITAL APPRECIATION SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $11.037
Accumulation Unit Value, End of Period                                        $11.037            $15.787
Number of Units Outstanding, End of Period                                     97,387            829,707

AIM V.I. CAPITAL DEVELOPMENT SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000              $9.914
Accumulation Unit Value, End of Period                                         $9.914             $12.658
Number of Units Outstanding, End of Period                                     12,713             125,972

AIM V.I. DENT DEMOGRAPHICS SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -            -

AIM V.I. DIVERSIFIED INCOME SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000             $9.873
Accumulation Unit Value, End of Period                                         $9.873             $9.577
Number of Units Outstanding, End of Period                                     31,735            248,525


AIM V.I. GLOBAL GROWTH AND INCOME  SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -            -

AIM V.I. GLOBAL UTILITIES SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $10.803
Accumulation Unit Value, End of Period                                        $10.803            $14.271
Number of Units Outstanding, End of Period                                     28,175            112,484

AIM V.I. GOVERNMENT SECURITIES SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $10.706
Accumulation Unit Value, End of Period                                        $10.706            $10.162
Number of Units Outstanding, End of Period                                     52,212            402,500

AIM V.I. GROWTH SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $11.824
Accumulation Unit Value, End of Period                                        $11.824            $15.815
Number of Units Outstanding, End of Period                                     77,514          1,176,171

AIM V.I. GROWTH AND INCOME SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $11.684
Accumulation Unit Value, End of Period                                        $11.684            $15.514
Number of Units Outstanding, End of Period                                    112,627          1,472,961

<PAGE>

AIM V.I. HIGH YIELD SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $9.099
Accumulation Unit Value, End of Period                                         $9.099            $9.946
Number of Units Outstanding, End of Period                                     61,267           374,834

AIM V.I. INTERNATIONAL EQUITY SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $9.674
Accumulation Unit Value, End of Period                                         $9.674            14.835
Number of Units Outstanding, End of Period                                     34,979           294,021

AIM V.I. MONEY MARKET SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $10.221
Accumulation Unit Value, End of Period                                        $10.221            $10.582
Number of Units Outstanding, End of Period                                    104,779            284,221

AIM V.I. TELECOMMUNICATIONS  AND TECHNOLOGY SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -            -

AIM V.I. VALUE SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                   $10.000           $11.747
Accumulation Unit Value, End of Period                                         $11.747           $15.091
Number of Units Outstanding, End of Period                                     139,946         1,901,840


* The Contracts  were first offered for sale on June 2, 1998.  The  Accumulation
Unit Values in this table  reflect a mortality  and expense risk charge of 1.00%
and an administrative  expense charge of 0.10%. All of the Variable Sub-Accounts
commenced  operations  on or before  June 2, 1998,  except  the Blue Chip,  Dent
Demographics,  Global Growth and Income and  Telecommunications  and  Technology
Variable  Sub-Accounts  ("the New  Sub-Accounts").  No Accumulation Unit Data is
shown for the New Sub-Accounts which commenced operations on January 3, 2000.


</TABLE>

<PAGE>



            Accumulation Unit Values and Number of Accumulation Units
            Outstanding for Each Variable Sub-Account Since Inception


                 Basic Policy plus Enhanced Death Benefit Rider
<TABLE>
<CAPTION>

<S>                                                                           <C>                <C>

For the years beginning January 1 and ending December 31                      1998               1999

AIM V.I. AGGRESSIVE GROWTH SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $10.549
Accumulation Unit Value, End of Period                                        $10.549            $15.063
Number of Units Outstanding, End of Period                                     57,688            314,748

AIM V.I. BALANCED SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $11.285
Accumulation Unit Value, End of Period                                        $11.285            $13.289
Number of Units Outstanding, End of Period                                    221,488           1,149,345

AIM V.I. BLUE CHIP SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period

AIM V.I. CAPITAL APPRECIATION SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $11.025
Accumulation Unit Value, End of Period                                        $11.025            $15.737
Number of Units Outstanding, End of Period                                    223,554            1,105,150

AIM V.I. CAPITAL DEVELOPMENT SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000             $9.902
Accumulation Unit Value, End of Period                                         $9.902            $12.619
Number of Units Outstanding, End of Period                                     55,046            195,123

AIM V.I. DENT DEMOGRAPHICS SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -

AIM V.I. DIVERSIFIED INCOME SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000             $9.861
Accumulation Unit Value, End of Period                                         $9.861             $9.547
Number of Units Outstanding, End of Period                                     40,007            277,036

AIM V.I. GLOBAL GROWTH AND INCOME  SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -

AIM V.I. GLOBAL UTILITIES SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $10.791
Accumulation Unit Value, End of Period                                        $10.791            $14.226
Number of Units Outstanding, End of Period                                     21,377            146,531

AIM V.I. GOVERNMENT SECURITIES SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $10.693
Accumulation Unit Value, End of Period                                        $10.693            $10.130
Number of Units Outstanding, End of Period                                     15,866            330,314

AIM V.I. GROWTH SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $11.810
Accumulation Unit Value, End of Period                                        $11.810            $15.765
Number of Units Outstanding, End of Period                                    182,188            1,590,694

AIM V.I. GROWTH AND INCOME SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $11.671
Accumulation Unit Value, End of Period                                        $11.671            $15.465
Number of Units Outstanding, End of Period                                    276,962            2,087,079



<PAGE>


AIM V.I. HIGH YIELD SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000             $9.088
Accumulation Unit Value, End of Period                                         $9.088             $9.914
Number of Units Outstanding, End of Period                                    103,485            361,905

AIM V.I. INTERNATIONAL EQUITY SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000             $9.663
Accumulation Unit Value, End of Period                                         $9.663            $14.788
Number of Units Outstanding, End of Period                                     63,514            374,374

AIM V.I. MONEY MARKET SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $10.209
Accumulation Unit Value, End of Period                                        $10.209            $10.549
Number of Units Outstanding, End of Period                                    111,395            250,507

AIM V.I. TELECOMMUNICATIONS AND TECHNOLOGY SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -            -

AIM V.I. VALUE SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                  $10.000            $11.733
Accumulation Unit Value, End of Period                                        $11.733            $15.044
Number of Units Outstanding, End of Period                                    350,953            2,912,880

* The Contracts,  including the Enhanced Death Benefit Rider, were first offered
for sale on June 2, 1998. The  Accumulation  Unit Values in this table reflect a
mortality and expense risk charge of 1.20% and an administrative  expense charge
of 0.10%.  All of the Variable  Sub-Accounts  commenced  operations on or before
June 2, 1998, except the Blue Chip, Dent Demographics,  Global Growth and Income
and   Telecommunications   and  Technology   Variable   Sub-Accounts  ("the  New
Sub-Accounts").  No  Accumulation  Unit Data is shown  for the New  Sub-Accounts
which commenced operations on January 3, 2000.



<PAGE>



                                     Accumulation Unit Values and Number of Accumulation Units
                                     Outstanding for Each Variable Sub-Account Since Inception

                               Basic Policy plus Enhanced Death and Income Benefit Combination Rider


For the years beginning January 1 and ending December 31                         1998            1999

AIM V.I. AGGRESSIVE GROWTH SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000          $10.536
Accumulation Unit Value, End of Period                                          $10.536          $15.016
Number of Units Outstanding, End of Period                                       63,177          256,328

AIM V.I. BALANCED SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000          $11.272
Accumulation Unit Value, End of Period                                          $11.272          $13.247
Number of Units Outstanding, End of Period                                      164,576          696,094

AIM V.I. BLUE CHIP SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -            -

AIM V.I. CAPITAL APPRECIATION SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000          $11.012
Accumulation Unit Value, End of Period                                          $11.012          $15.687
Number of Units Outstanding, End of Period                                      203,098          691,747

AIM V.I. CAPITAL DEVELOPMENT SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000            $9.891
Accumulation Unit Value, End of Period                                           $9.891          $12.579
Number of Units Outstanding, End of Period                                       42,275            94,929

AIM V.I. DENT DEMOGRAPHICS SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -            -

AIM V.I. DIVERSIFIED INCOME SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000           $9.850
Accumulation Unit Value, End of Period                                           $9.850           $9.516
Number of Units Outstanding, End of Period                                       25,503          156,436

AIM V.I. GLOBAL GROWTH AND INCOME  SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -            -

AIM V.I. GLOBAL UTILITIES SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000          $10.778
Accumulation Unit Value, End of Period                                          $10.778          $14.181
Number of Units Outstanding, End of Period                                       16,742          81,745

AIM V.I. GOVERNMENT SECURITIES SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000          $10.681
Accumulation Unit Value, End of Period                                          $10.681          $10.098
Number of Units Outstanding, End of Period                                       28,964          192,103

AIM V.I. GROWTH SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000          $11.797
Accumulation Unit Value, End of Period                                          $11.797          $15.715
Number of Units Outstanding, End of Period                                      233,659          1,047,361

AIM V.I. GROWTH AND INCOME SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000          $11.657
Accumulation Unit Value, End of Period                                          $11.657          $15.416
Number of Units Outstanding, End of Period                                      384,306          1,263,124



<PAGE>




AIM V.I. HIGH YIELD SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000           $9.077
Accumulation Unit Value, End of Period                                           $9.077          $9.883
Number of Units Outstanding, End of Period                                       55,345          246,594

AIM V.I. INTERNATIONAL EQUITY SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000           $9.651
Accumulation Unit Value, End of Period                                           $9.651          $14.741
Number of Units Outstanding, End of Period                                       63,643          266,112

AIM V.I. MONEY MARKET SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000          $10.197
Accumulation Unit Value, End of Period                                          $10.197          $10.516
Number of Units Outstanding, End of Period                                       61,481          209,100

AIM V.I. TELECOMMUNICATIONS AND TECHNOLOGY SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                        -            -
Accumulation Unit Value, End of Period                                              -            -
Number of Units Outstanding, End of Period                                          -            -

AIM V.I. VALUE SUB-ACCOUNT
Accumulation Unit Value, Beginning of Period                                    $10.000          $11.719
Accumulation Unit Value, End of Period                                          $11.719          $14.996
Number of Units Outstanding, End of Period                                      397,504          1,742,887
</TABLE>

* The Contracts,  including the Enhanced  Death and Income  Benefit  Combination
Rider, were first offered for sale on June 2, 1998. The Accumulation Unit Values
in this  table  reflect a  mortality  and  expense  risk  charge of 1.40% and an
administrative  expense  charge  of  0.10%.  All  of the  Variable  Sub-Accounts
commenced  operations  on or before  June 2, 1998,  except  the Blue Chip,  Dent
Demographics,  Global Growth and Income and  Telecommunications  and  Technology
Variable  Sub-Accounts  ("the New  Sub-Accounts").  No Accumulation Unit Data is
shown for the New Sub-Accounts which commenced operations on January 3, 2000.



<PAGE>



                                   APPENDIX B

                             MARKET VALUE ADJUSTMENT

The Market Value Adjustment is based on the following:

       I = the Treasury Rate, for a maturity equal to the Guarantee Period,  for
       the week preceding the establishment of the Guarantee Period.

       N = the number of whole and  partial  years from the date we receive  the
       withdrawal,  transfer or death benefit request,  or from the Payout Start
       Date, to the end of the Guarantee Period.

       J = the Treasury Rate, for a maturity equal to the Guarantee Period,  for
       the  week  preceding  the  receipt  of the  withdrawal,  transfer,  death
       benefit, or income payment request.

       "Treasury Rate" means the U.S.  Treasury Note Constant  Maturity yield as
       reported in Federal Reserve Bulletin Release H.15.

The Market Value Adjustment factor is determined from the following formula:

                                                          .9 X (I - J) X N

To determine  the Market  Value  Adjustment,  we will  multiply the Market Value
Adjustment  factor by the amount  transferred,  withdrawn (in excess of the Free
Withdrawal Amount),  paid as a death benefit, or applied to an Income Plan, from
a Guarantee  Period at any time other than  during the 30 day period  after such
Guarantee Period expires.


<PAGE>



                       EXAMPLES OF MARKET VALUE ADJUSTMENT

Purchase Payment:                      $10,000 allocated to a Guarantee Period
Guarantee Period:                      5 years
Guaranteed Interest Rate:              4.50%
5 Year Treasury Rate (at the
time the Guarantee
period was established):               4.50%
Full Surrender:                        End of Contract Year 3

NOTE: These examples assume that premium taxes are not applicable.
<TABLE>
<CAPTION>

                                           EXAMPLE 1: (Assumes declining interest rates)

<S>  <C>                                                             <C>
Step 1. Calculate Contract Value at End of Contract Year 3:          $10,000.00 X (1.0450)^3 = $11,411.66

Step 2. Calculate the Free Withdrawal Amount:                        .15% X $10,000 X (1.045)^2 = $1,638.04

Step 3. Calculate the Withdrawal Charge:                             = .06 X ($10,000.00 - $1,638.04) = $501.72

Step 4. Calculate the Market Value Adjustment:                       I    =            4.5%
                                                                     J    =            4.2%

                                                                                         730 Days
                                                                     N    =              365 days      = 2

                                                                     Market Value Adjustment Factor: .9 X (I-J) X N

                                                                     = .9 X (.045 - .042) X (2) = .0054

                                                                     Market Value Adjustment =  Market Value Adjustment
                                                                     Factor X Amount Subject to Market Value Adjustment:

                                                                     = .0054 X ($11,411.66 - $1,638.04) = $52.78


Step 5. Calculate the amount received by Contract owner as a
result of full withdrawal at the end of Contract Year 3:             $11,411.66 - $501.72 + $52.78 = $10,962.72

</TABLE>



<PAGE>


<TABLE>
<CAPTION>

                                             EXAMPLE 2: (Assumes rising interest rates)

<S>  <C>                                                              <C>              <C>
Step 1. Calculate Contract Value at End of Contract Year 3:           $10,000.00 X (1.045)^3 = $11,411.66

Step 2. Calculate the Free Withdrawal Amount:                         .15% X $10,000 X (1.045)^2 = $1,638.04

Step 3. Calculate the Withdrawal Charge:                              .06 X ($10,000.00 - $1,638.04) = $501.72

Step 4. Calculate the Market Value Adjustment:                        I    =    4.5%
                                                                      J    =    4.8%

                                                                                730 days
                                                                      N    =    365 days      = 2

                                                                      Market Value Adjustment Factor: .9 X (I-J) X N

                                                                      = .9 X (.045 - .048) X (2) = -.0054

                                                                      Market Value Adjustment = Market Value Adjustment
                                                                      Factor X Amount Subject to Market Value Adjustment

                                                                      = -.0054 X ($11,411.66 - $1,638.04) = - $52.78

Step 5. Calculate the amount received by Contract owner as a
result of full withdrawal at the end of Contract Year 3:              $11,411.66 - $501.72 - 52.78 = $10,857.16

</TABLE>



<PAGE>



                       STATEMENT OF ADDITIONAL INFORMATION
                                TABLE OF CONTENTS

Description

Additions, Deletions or Substitutions of Investments.
The Contract.
             Purchases of Contracts
             Tax-free Exchanges (1035 Exchanges, Rollovers and Transfers)
Performance Information
             Standardized Total Returns
             Non-standardized Total Returns
             Adjusted Historical Total Returns
Calculation of Accumulation Unit Values
             Net Investment Factor
Calculation of Variable Income Payments
             Calculation of Annuity Unit Values
General Matters
             Incontestability
             Settlements.
             Safekeeping of the Variable Account's Assets
             Premium Taxes
             Tax Reserves
Federal Tax Matters
             Taxation of Glenbrook Life and Annuity Company
             Exceptions to the Non-Natural Owner Rule
             IRS Required Distribution at Death Rules
Qualified Plans
             Individual Retirement Annuities.
             Roth Individual Retirement Annuities
             Simplified Employee Pension Plans.
             Savings Inventive Match Plans for Employees (Simple Plans)
             Tax Sheltered Annuities.
             Corporate and Self-Employed Pension and Profit Sharing Plans
             State and Local Government and Tax-Exempt Organization
                Deferred Compensation Plans
Experts
Financial Statements

<PAGE>

This  prospectus  does not constitute an offering in any  jurisdiction  in which
such offering may not lawfully be made.  We do not  authorize  anyone to provide
any  information  or  representations  regarding the offering  described in this
prospectus other than as contained in this prospectus.


                   [back cover]


<PAGE>

                                     PART II
                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     The By-laws of Glenbrook Life and Annuity  Company  ("Registrant")  provide
that  Registrant  will indemnify its officers and directors for certain  damages
and  expenses  that  may be  incurred  in  the  performance  of  their  duty  to
Registrant.  No  indemnification  is  provided,  however,  when  such  person is
adjudged to be liable for negligence or misconduct in the  performance of his or
her duty,  unless  indemnification  is  deemed  appropriate  by the  court  upon
application.

ITEM 16.  EXHIBITS.

Exhibit No.    Description

(1)  Form  of  Underwriting  Agreement  (Incorporated  herein  by  reference  to
     Post-Effective  Amendment  No.  1 to  Registrant's  Form  S-1  Registration
     Statement (File No. 033-62193) dated March 22, 1996.)

(2)  None

(4)  Form of  Glenbrook  Life and  Annuity  Company  Flexible  Premium  Deferred
     Variable  Annuity  Contract and  Application  (Previously  filed in initial
     filing to this Registration  Statement (File No. 333-50873) dated April 23,
     1998.)

(5)(a) Opinion of General  Counsel  re:  Legality  (Previously  filed in initial
       filing of this Registration  Statement (File No. 333-50873) dated April
       24, 1998.)

(5)(b)  Opinion  of  General   Counsel  re:   Legality   (Previously   filed  in
     Post-Effective Amendment No. 1 to form S-1 on Form S-3 to this Registration
     Statement (File No. 333-50873) dated April 30, 1999.)

(8)  None

(11) None

(12) None

(15) None

(23)(a) Independent Auditors' Consent

(23)(b) Consent of Freedman,  Levy,  Kroll &  Simonds

(24) Powers of Attorney for Thomas J. Wilson II,  Michael J.  Velotta,  Sarah R.
     Donahue, Brent H. Hamann, John R. Hunter, Kevin R. Slawin,Timothy N. Vander
     Pas, and G. Craig Whitehead


(25) None

(26) None

(27) Not applicable

(99) Form of Resolution of Board of Directors  (Incorporated herein by reference
     to  Post-Effective  Amendment No. 1 to Registrant's  Form S-1  Registration
     Statement (File No. 033-92842) dated April 9, 1996.)
<PAGE>

ITEM 17.  UNDERTAKINGS.

The undersigned registrant hereby undertakes:

(1) to file,  during  any  period in which  offers or sales  are being  made,  a
post-effective amendment to the registration statement:

     (i)  to  include  any  prospectus  required  by  section  10(a)(3)  of  the
          Securities Act of 1933;

     (ii) to reflect in the  prospectus  any facts or events  arising  after the
          effective  date of the  registration  statement  (or the  most  recent
          post-effective  amendment  thereof  )  which,  individually  or in the
          aggregate, represent a fundamental change in the information set forth
          in the registration statement; and

     (iii)to  include  any  material  information  with  respect  to the plan of
          distribution not previously disclosed in the registration statement or
          any material change to such information in the registration statement;

provided,  however,  that  paragraphs  (1)(i)  and  (1)(ii)  do not apply if the
information  required  to be  included in a  post-effective  amendment  by those
paragraphs  is  contained  in periodic  reports  filed with or  furnished to the
Commission  by  Registrant  pursuant  to Section  13 or 15(d) of the  Securities
Exchange Act of 1934 that are  incorporated  by  reference  in the  registration
statement.

(2) That, for the purpose of determining  any liability under the Securities Act
of  1933,  each  such  post-effective  amendment  shall  be  deemed  to be a new
registration  statement  relating to the  securities  offered  therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof;

(3) To remove from  registration by means of a  post-effective  amendment any of
the securities  being  registered  which remain unsold at the termination of the
offering.

Insofar as indemnification  for liabilities  arising under the Securities Act of
1933 may be permitted to  directors,  officers  and  controlling  persons of the
registrant,  Glenbrook  Life and  Annuity  Company,  pursuant  to the  foregoing
provisions, or otherwise, the registrant has been advised that in the opinion of
the Securities and Exchange  Commission such  indemnification  is against public
policy as expressed in the Act and is,  therefore,  unenforceable.  In the event
that a claim  for  indemnification  against  such  liabilities  (other  than the
payment by  registrant  of expenses  incurred or paid by a director,  officer or
controlling  person of the registrant in the  successful  defense of any action,
suit or proceeding) is asserted by such director,  officer or controlling person
in connection with the securities being registered,  the registrant will, unless
in the  opinion  of its  counsel  the matter  has been  settled  by  controlling
precedent,  submit to a court of appropriate  jurisdiction  the question whether
such  indemnification  by it is  against  public  policy  as  expressed  in  the
Securities Act and will be governed by the final adjudication of such issue.

<PAGE>
                                   SIGNATURES


As required by the  Securities  Act of 1933,  Registrant  certifies  that it has
reasonable  grounds to believe that it meets all of the  requirements for filing
on Form S-3 and has duly caused this amended registration statement to be signed
on its behalf by the  undersigned,  thereunto duly authorized in the Township of
Northfield, State of Illinois on the 18th day of April, 2000.


                       GLENBROOK LIFE AND ANNUITY COMPANY
                                  (REGISTRANT)





                         By:/s/ MICHAEL J. VELOTTA
                         ---------------------------------
                          Michael J. Velotta
                          Vice President, Secretary and General Counsel


Pursuant  to the  requirements  of the  Securities  Act of  1933,  this  amended
registration  statement  has  been  signed  by  the  following  persons  in  the
capacities indicated on the 18th day of April, 2000.



*/THOMAS J. WILSON, II               President, Chief Operating Officer
Thomas J. Wilson, II                 and Director,(Principal Executive Officer)



/s/ MICHAEL J. VELOTTA               Vice President, Secretary,
Michael J. Velotta                   General Counsel and Director


*/JOHN R. HUNTER                     Vice President and Director
John R. Hunter


*/KEVIN R. SLAWIN                    Vice President and Director
Kevin R. Slawin                      (Principal Financial Officer)


*/SAMUEL H. PILCH                    Controller
Samuel H. Pilch                      (Principal Accounting Officer)


*/SARAH R. DONAHUE                   Assistant Vice President and Director
Sarah R. Donahue


*/TIMOTHY N. VANDER PAS              Assistant Vice President and Director
Timothy N. Vander Pas


*/BRENT H. HAMANN                    Director
Brent H. Hamann


*/G. CRAIG WHITEHEAD                 Assistant Vice President and Director
G. Craig Whitehead



*/By Michael J. Velotta, pursuant to Powers of Attorney filed herewith


<PAGE>


Exhibit Index

Item No.                 Description

23(a)                   Independent Auditors' Consent
23(b)                   Consent of Freedman, Levy, Kroll & Simonds
24                      Powers of Attorney for Thomas J. Wilson II,
                        Michael J. Velotta, Sarah R. Donahue, Brent H. Hamann,
                        John R. Hunter, Kevin R. Slawin,Timothy N. Vander Pas,
                        and G. Craig Whitehead




(23)(a) Independent Auditors' Consent

INDEPENDENT AUDITORS' CONSENT

We consent to the  incorporation by reference in this  Post-Effective  Amendment
No. 2 to Registration  Statement 333-50873 of Glenbrook Life and Annuity Company
on Form S-3 of our report  dated  February  25,  2000,  appearing  in the Annual
Report on Form 10-K of  Glenbrook  Life and  Annuity  Company for the year ended
December 31, 1999 and of our reports dated  February 25, 2000 and March 27, 2000
appearing in the Statement of Additional Information on Form N-4 dated April 18,
2000 of  Glenbrook  Life and  Annuity  Company  and  Glenbrook  Life and Annuity
Company Separate Account A, respectively. We also consent to the reference to us
under  the  heading  "Experts"  in  the  Prospectus,   which  is  part  of  such
Registration Statement.




Chicago, Illinois
April 18, 2000


<PAGE>
(23)(b) Consent of Freedman,  Levy,  Kroll &  Simonds



FREEDMAN, LEVY, KROLL & SIMONDS



                                   CONSENT OF
                         FREEDMAN, LEVY, KROLL & SIMONDS


     We hereby  consent to the  reference  to our firm under the caption  "Legal
Matters" in the prospectus  contained in  Post-Effective  Amendment No. 2 to the
Form S-3 Registration  Statement of Glenbrook Life and Annuity Company (File No.
333-50873).


                               /s/  Freedman, Levy, Kroll & Simonds
                               FREEDMAN, LEVY, KROLL & SIMONDS

Washington, D.C.
April 19, 2000




                                POWER OF ATTORNEY

                   WITH RESPECT TO GLENBROOK LIFE AND ANNUITY COMPANY
                                  (REGISTRANT)

                             AIM VARIABLE ANNUITY II



         Know all men by  these  presents  that  Thomas  J.  Wilson,  II,  whose
signature  appears  below,  constitutes  and appoints  Michael J.  Velotta,  his
attorney  in  fact,  with  full  power of  substitution,  and him in any and all
capacities,  to sign any Registration  Statements and amendments thereto for the
Registrant,  Glenbrook Life and Annuity  Company,  and to file the same with the
exhibits  thereto  and  other  documents  in  connection  therewith,   with  the
Securities  and Exchange  Commission,  hereby  ratifying and confirming all that
said attorney in fact, or his substitute or  substitutes,  may do or cause to be
done by virtue hereof.


                                   April 20, 2000
                                   Date



                                   /s/THOMAS J. WILSON, II
                                   Thomas J. Wilson, II
                                   President, Chief Operating Officer
                                   (Principal Executive Officer) and Director




<PAGE>





                                POWER OF ATTORNEY

                   WITH RESPECT TO GLENBROOK LIFE AND ANNUITY COMPANY
                                  (REGISTRANT)

                             AIM VARIABLE ANNUITY II



         Know all men by these presents that Michael J. Velotta, whose signature
appears below,  constitutes and appoints  Thomas J. Wilson,  II, his attorney in
fact, with full power of  substitution,  and him in any and all  capacities,  to
sign any  Registration  Statements  and amendments  thereto for the  Registrant,
Glenbrook  Life and  Annuity  Company,  and to file the same  with the  exhibits
thereto and other  documents in connection  therewith,  with the  Securities and
Exchange  Commission,  hereby ratifying and confirming all that said attorney in
fact,  or his  substitute or  substitutes,  may do or cause to be done by virtue
hereof.


                                    April 20, 2000
                                    Date



                                    /s/MICHAEL J. VELOTTA
                                    Michael J. Velotta
                                    Vice President, Secretary,
                                    General Counsel and Director



<PAGE>




                                POWER OF ATTORNEY

                   WITH RESPECT TO GLENBROOK LIFE AND ANNUITY COMPANY
                                  (REGISTRANT)

                             AIM VARIABLE ANNUITY II



         Know all men by these presents that Sarah R. Donahue,  whose  signature
appears  below,  constitutes  and  appoints  Thomas J. Wilson II, and Michael J.
Velotta,  and each of them  (with  full  power to each of them to act alone) her
attorney in fact, with power of substitution, and him in any and all capacities,
to sign any Registration  Statements and amendments  thereto for the Registrant,
Glenbrook  Life and  Annuity  Company,  and to file the same  with the  exhibits
thereto and other  documents in connection  therewith,  with the  Securities and
Exchange  Commission,  hereby  ratifying  and  confirming  all that each of said
attorney in fact, or his substitute or  substitutes,  may do or cause to be done
by virtue hereof.


                                     April 20, 2000
                                     Date



                                     /s/SARAH R. DONAHUE
                                     Sarah R. Donahue
                                     Assistant Vice President and Director



<PAGE>





                                POWER OF ATTORNEY

                   WITH RESPECT TO GLENBROOK LIFE AND ANNUITY COMPANY
                                  (REGISTRANT)

                             AIM VARIABLE ANNUITY II



         Know all men by these  presents  that John R. Hunter,  whose  signature
appears  below,  constitutes  and  appoints  Thomas J. Wilson II, and Michael J.
Velotta,  and each of them  (with  full  power to each of them to act alone) his
attorney in fact, with power of substitution, and him in any and all capacities,
to sign any Registration  Statements and amendments  thereto for the Registrant,
Glenbrook  Life and  Annuity  Company,  and to file the same  with the  exhibits
thereto and other  documents in connection  therewith,  with the  Securities and
Exchange  Commission,  hereby  ratifying  and  confirming  all that each of said
attorney in fact, or his substitute or  substitutes,  may do or cause to be done
by virtue hereof.


                                  April 20, 2000
                                  Date



                                  /s/JOHN R. HUNTER
                                  John R. Hunter
                                  Vice President and Director



<PAGE>





                                POWER OF ATTORNEY

                   WITH RESPECT TO GLENBROOK LIFE AND ANNUITY COMPANY
                                  (REGISTRANT)

                             AIM VARIABLE ANNUITY II



         Know all men by these  presents that Samuel H. Pilch,  whose  signature
appears  below,  constitutes  and  appoints  Thomas J. Wilson II, and Michael J.
Velotta,  and each of them  (with  full  power to each of them to act alone) his
attorney in fact, with power of substitution, and him in any and all capacities,
to sign any Registration  Statements and amendments  thereto for the Registrant,
Glenbrook  Life and  Annuity  Company,  and to file the same  with the  exhibits
thereto and other  documents in connection  therewith,  with the  Securities and
Exchange  Commission,  hereby  ratifying  and  confirming  all that each of said
attorney in fact, or his substitute or  substitutes,  may do or cause to be done
by virtue hereof.


                                   April 20, 2000
                                   Date



                                   /s/SAMUEL H. PILCH
                                   Samuel H. Pilch
                                   Controller (Principal Accounting
Officer)





<PAGE>





                                POWER OF ATTORNEY

                   WITH RESPECT TO GLENBROOK LIFE AND ANNUITY COMPANY
                                  (REGISTRANT)

                             AIM VARIABLE ANNUITY II



         Know all men by these  presents that Kevin R. Slawin,  whose  signature
appears  below,  constitutes  and  appoints  Thomas J. Wilson II, and Michael J.
Velotta,  and each of them  (with  full  power to each of them to act alone) his
attorney in fact, with power of substitution, and him in any and all capacities,
to sign any Registration  Statements and amendments  thereto for the Registrant,
Glenbrook  Life and  Annuity  Company,  and to file the same  with the  exhibits
thereto and other  documents in connection  therewith,  with the  Securities and
Exchange  Commission,  hereby  ratifying  and  confirming  all that each of said
attorney in fact, or his substitute or  substitutes,  may do or cause to be done
by virtue hereof.


                                   April 20, 2000
                                   Date



                                   /s/KEVIN R. SLAWIN
                                   Kevin R. Slawin
                                   Vice President and Director
                                   (Principal Financial Officer)



<PAGE>





                                POWER OF ATTORNEY

                   WITH RESPECT TO GLENBROOK LIFE AND ANNUITY COMPANY
                                  (REGISTRANT)

                             AIM VARIABLE ANNUITY II



         Know all men by these  presents  that  Timothy  N.  Vander  Pas,  whose
signature  appears  below,  constitutes  and  appoints  Thomas J. Wilson II, and
Michael  J.  Velotta,  and each of them  (with full power to each of them to act
alone) his attorney in fact, with power of substitution,  and him in any and all
capacities,  to sign any Registration  Statements and amendments thereto for the
Registrant,  Glenbrook Life and Annuity  Company,  and to file the same with the
exhibits  thereto  and  other  documents  in  connection  therewith,   with  the
Securities  and Exchange  Commission,  hereby  ratifying and confirming all that
each of said attorney in fact, or his substitute or substitutes, may do or cause
to be done by virtue hereof.


                                    April 20, 2000
                                    Date



                                    /s/TIMOTHY N. VANDER PAS
                                    Timothy N. Vander Pas
                                    Assistant Vice President and Director



<PAGE>



                                POWER OF ATTORNEY

                   WITH RESPECT TO GLENBROOK LIFE AND ANNUITY COMPANY
                                  (REGISTRANT)

                             AIM VARIABLE ANNUITY II



         Know all men by these  presents that Brent H. Hamann,  whose  signature
appears  below,  constitutes  and  appoints  Thomas J. Wilson II, and Michael J.
Velotta,  and each of them  (with  full  power to each of them to act alone) his
attorney in fact, with power of substitution, and him in any and all capacities,
to sign any Registration  Statements and amendments  thereto for the Registrant,
Glenbrook  Life and  Annuity  Company,  and to file the same  with the  exhibits
thereto and other  documents in connection  therewith,  with the  Securities and
Exchange  Commission,  hereby  ratifying  and  confirming  all that each of said
attorney in fact, or his substitute or  substitutes,  may do or cause to be done
by virtue hereof.


                                   April 20, 2000
                                   Date



                                   /s/BRENT H. HAMANN
                                   Brent H. Hamann
                                   Director



<PAGE>



                                POWER OF ATTORNEY

                   WITH RESPECT TO GLENBROOK LIFE AND ANNUITY COMPANY
                                  (REGISTRANT)

                             AIM VARIABLE ANNUITY II



         Know all men by these presents that G. Craig Whitehead, whose signature
appears  below,  constitutes  and  appoints  Thomas J. Wilson II, and Michael J.
Velotta,  and each of them  (with  full  power to each of them to act alone) his
attorney in fact, with power of substitution, and him in any and all capacities,
to sign any Registration  Statements and amendments  thereto for the Registrant,
Glenbrook  Life and  Annuity  Company,  and to file the same  with the  exhibits
thereto and other  documents in connection  therewith,  with the  Securities and
Exchange  Commission,  hereby  ratifying  and  confirming  all that each of said
attorney in fact, or his substitute or  substitutes,  may do or cause to be done
by virtue hereof.


                                 April 20, 2000
                                 Date



                                 /s/G. CRAIG WHITEHEAD
                                 G. Craig Whitehead
                                 Assistant Vice President and Director




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