OHIO NATIONAL VARIABLE ACCOUNT A
485APOS, 1998-03-02
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<PAGE>   1

                                                              File No. 333-10907
                                                                        811-1978
                                                   
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                    FORM N-4
                                                    
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933                  /X/
      Pre-Effective Amendment No.                                        / /
   
      Post-Effective Amendment No. 2                                     /X/
    
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 / X /
      Amendment No.                                                      / /

                           (Exact Name of Registrant)
                        OHIO NATIONAL VARIABLE ACCOUNT A

                               (Name of Depositor)
                    THE OHIO NATIONAL LIFE INSURANCE COMPANY
              (Address of Depositor's Principal Executive Offices)
                                One Financial Way
                             Cincinnati, Ohio 45242
                         (Depositor's Telephone Number)
                                 (513) 794-6316

                     (Name and Address of Agent for Service)
   
           Ronald L. Benedict, Corporate Vice President, Counsel and Secretary
    
                    The Ohio National Life Insurance Company
                                  P.O. Box 237
                             Cincinnati, Ohio 45201

                                   Notice to:
                           W. Randolph Thompson, Esq.
                                   Of Counsel
                              Jones & Blouch L.L.P.
                                 Suite 405 West
                       1025 Thomas Jefferson Street, N.W.
                             Washington, D.C. 20007

Approximate Date of Proposed Public Offering: As soon after the effective date
of this amendment as is practicable.

   
    

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

      ___     immediately upon filing pursuant to paragraph (b)
   
      ___     on (date) pursuant to paragraph (b)(1)(ix)
    
      ___     60 days after filing pursuant to paragraph (a)(i)
   
      _X_     on May 1, 1998 pursuant to paragraph (a)(i)
    
      ___     75 days after filing pursuant to paragraph (a)(ii)
      ___     on (date) pursuant to paragraph (a)(ii) of Rule 485.
 If appropriate, check the following box:
      ___     this post-effective amendment designates a new effective date for 
              a previously filed post-effective amendment.
<PAGE>   2


                                    OHIO NATIONAL VARIABLE ACCOUNT A

   
<TABLE>
<CAPTION>
N-4 Item                            Caption in Prospectus
- --------                            ---------------------
<S>                                 <C>
   1                                Cover Page

   2                                Glossary of Special Terms

   3                                Not applicable

   4                                Accumulation Unit Values   

   5                                The Ohio National Companies

   6                                Deductions and Expenses

   7                                Description of Variable Annuity Contracts

   8                                Annuity Period

   9                                Death Benefit

   10                               Accumulation Period

   11                               Surrender and Partial Withdrawal

   12                               Federal Tax Status

   13                               Not applicable

   14                               Table of Contents

                                    Caption in Statement of Additional Information

   15                               Cover Page

   16                               Table of Contents

   17                               Not applicable

   18                               Custodian
                                    Independent Certified Public Accountants

   19                               See Prospectus (Distribution of Variable Annuity Contracts)
                                    Loans Under Tax-Sheltered Annuities
</TABLE>
    
<PAGE>   3
<TABLE>
<CAPTION>
N-4 Item                            Caption in Prospectus
- --------                            ---------------------
<S>                                 <C>
   20                               Underwriter

   21                               Calculation of Money Market Subaccount Yield
                                    Total Return

   22                               See Prospectus (Annuity Period)

   23                               Financial Statements

                                    Caption in Part C

   24                               Financial Statements and Exhibits

   25                               Directors and Officers of the Depositor

   26                               Persons Controlled by or Under Common Control with the Depositor or     Registrant

   27                               Number of Contractowners

   28                               Indemnification

   29                               Principal Underwriter

   30                               Location of Accounts and Records

   31                               Not applicable

   32                               Not applicable
</TABLE>


<PAGE>   4

















                                     PART A

                                   PROSPECTUS
<PAGE>   5
                                   PROSPECTUS
                            FLEXIBLE PURCHASE PAYMENT
                      INDIVIDUAL VARIABLE ANNUITY CONTRACTS
                        OHIO NATIONAL VARIABLE ACCOUNT A
                    THE OHIO NATIONAL LIFE INSURANCE COMPANY
                                ONE FINANCIAL WAY
                             CINCINNATI, OHIO 45242
                            TELEPHONE (513) 794-6452

   
This prospectus offers a multiple funded, flexible purchase payment, individual
variable annuity contract that provides for the accumulation of values and the
payment of annuity benefits on a variable and/or fixed basis. Unless
specifically stated otherwise, only provisions relating to the variable portion
of the contracts are described in this prospectus. The fixed portion
("Guaranteed Account") is briefly described in an appendix to the Statement of
Additional Information.
    

Variable annuities are designed to provide lifetime annuity payments which will
vary with the investment results of the investment vehicle chosen. The
accumulation value of a contract will vary with the investment performance of
Ohio National Fund, Inc. (the "Fund") or of other eligible investment companies
("Other Funds"), prior to the annuity payout date, and the amount of each
annuity payment will vary with the investment performance of the Fund or Other
Fund subsequent to the commencement of annuity payments. There can be no
assurance that the value of a contract during the years prior to the annuity
payout date or the aggregate amount of annuity payments received after such date
will equal or exceed the purchase payments made therefor.

   
The variable annuity contracts offered by this prospectus are designed for (1)
annuity purchase plans adopted by public school systems and certain tax-exempt
organizations described in Section 501(c)(3) of the Internal Revenue Code (the
"Code"), qualifying for tax-deferred treatment pursuant to Section 403(b) of the
Code, (2) other employee pension or profit-sharing trusts or plans qualifying
for tax-deferred treatment under Section 401(a), 401(k) or 403(a) of the Code,
(3) individual retirement annuities qualifying for tax-deferred treatment under
Section 408 or 408A of the Code, (4) state and municipal deferred compensation
plans and (5) non-tax-qualified retirement plans.
    

   
The minimum initial purchase payment is $2,000 for tax-qualified contracts and
$5,000 for non-tax-qualified contracts. Smaller payments may be permitted for
payroll deductions or employee benefit plans. Payments after the first payment
may be made at any time in amounts of at least $500. Ohio National Life
reserves the right to restrict total purchase payments in excess of $1,000,000.

Purchase payments are allocated to one or more (but not more than 10 variable)
subaccounts of Ohio National Variable Account A ("VAA") as directed by the
contract owner. VAA is a separate account established by The Ohio National Life
Insurance Company ("Ohio National Life"). The assets of VAA are invested in
shares of the Fund, a mutual fund having 12 portfolios in which the contracts'
assets may be invested: Equity Portfolio, Money Market Portfolio, Bond
Portfolio, Omni Portfolio, International Portfolio, Capital Appreciation
Portfolio, Small Cap Portfolio, Global Contrarian Portfolio, Aggressive Growth
Portfolio, Strategic Income Portfolio, Stellar Portfolio and Relative Value
Portfolio. Presently, the only Other Fund in which contract assets may be
invested is the Emerging Markets Fund of the Montgomery Variable Series 
("Emerging Markets Fund"). (See the accompanying prospectuses of the Fund and
of the Emerging Markets Fund which might also contain information about other
portfolios that are not available for the contracts offered herein.)

All or part of the contract's accumulation value may be withdrawn before the
annuity payout date. Amounts withdrawn may be subject to federal income tax
penalties. A contingent deferred sales charge up to 7% of the amount withdrawn  
may be assessed.  Up to 10% of the accumulation value may be withdrawn each
year without this charge. Exercise of contract rights may be subject to the
terms of any qualified employee trust or annuity plan under which a contract is
purchased. This prospectus contains no information concerning such trusts or
plans.
    

The contracts offered hereby may be revoked by the purchaser without penalty
within 20 days of their delivery.

   
THIS PROSPECTUS SHOULD BE RETAINED FOR FUTURE REFERENCE. IT SETS FORTH THE
INFORMATION ABOUT VAA AND THE VARIABLE ANNUITY CONTRACTS OFFERED BY THIS
PROSPECTUS THAT YOU SHOULD KNOW BEFORE INVESTING. ADDITIONAL INFORMATION ABOUT
VAA HAS BEEN FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IN A STATEMENT 
OF ADDITIONAL INFORMATION DATED MAY 1, 1998 THE STATEMENT OF ADDITIONAL
INFORMATION IS INCORPORATED HEREIN BY REFERENCE AND IS AVAILABLE UPON REQUEST
AND WITHOUT CHARGE BY WRITING OR CALLING OHIO NATIONAL LIFE AT THE ABOVE
ADDRESS. THE TABLE OF CONTENTS FOR THE STATEMENT OF ADDITIONAL INFORMATION IS 
ON PAGE 2.
    

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION NOR HAS THE COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY
OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
THIS PROSPECTUS SHOULD BE ACCOMPANIED BY THE CURRENT PROSPECTUS OF OHIO NATIONAL
FUND, INC.

                                  May 1, 1998
FORM V-4825-A
<PAGE>   6



                                TABLE OF CONTENTS

<TABLE>
<S>                                                       <C>
Fee Table..................................................3
     Financial Statements..................................4
The Ohio National Financial Services Group.................5
     Ohio National Life....................................5
     Ohio National Variable Account A......................5
     Ohio National Fund, Inc...............................5
     Emerging Markets Fund.................................5
Distribution of Variable Annuity Contracts.................6
Deductions and Expenses....................................7
     Contingent Deferred Sales Charge......................7
     Contract Administration Charge........................7
     Deduction For Administrative Expenses.................7
     Deduction For Risk Undertakings.......................7
     Transfer Fee..........................................8
     Deduction For State Premium Tax.......................8
     Fund Expenses.........................................8
Description of Variable Annuity Contracts..................8
     20-Day Free Look......................................8
     Accumulation Period...................................8
     Annuity Period.......................................12
     Contract Owner Inquiries.............................14
     Performance Data.....................................14
Federal Tax Status........................................14
IRA Disclosure Statement..................................18


- -------------------------------------------------------------
          STATEMENT OF ADDITIONAL INFORMATION

Custodian
Independent Certified Public Accountants
Underwriter
Calculation of Money Market Subaccount Yield
Total Return
Transfer Limitations
   
The Year 2000 Issue
Appendix: Loans Under Tax-Sheltered Annuities
           Guaranteed Account
Financial Statements for VAA and Ohio National Life
</TABLE>
    


                            GLOSSARY OF SPECIAL TERMS

ACCUMULATION PERIOD - The period prior to the annuity payout date and during the
lifetime of the annuitant.

ACCUMULATION UNIT - A unit of measure used to determine the value of contracts
during the accumulation period.

ACCUMULATION VALUE - The cash value of an annuity contract before the annuity
payout date.

ANNUITANT - Any natural person who is to receive or is receiving annuity
payments and upon whose continuation of life annuity payments with life
contingencies depend.

ANNUITY PAYOUT DATE - The date on which annuity payments are to begin.

ANNUITY PAYMENTS - Periodic payments made to an annuitant pursuant to an annuity
contract.

ANNUITY UNIT - A unit of measure used to determine the second and subsequent
variable annuity payments and reflecting the investment performance of the Fund.

FUND - Ohio National Fund, Inc.

FUND SHARES - Shares of the Fund or of any Other Fund.

OTHER FUND - Any registered open-end investment company in which contract assets
may be invested other than the Fund.

OWNER - During the lifetime of the designated annuitant and prior to the
specified annuity payout date, the owner is the person in whose name the
contract is registered. On and after the annuity payout date the annuitant
becomes the owner. After the death of the annuitant, the beneficiary becomes the
owner.

PURCHASE PAYMENTS - The amount of payments made by the owner or on his behalf
under the annuity contract.

SETTLEMENT - The application of the accumulation value of an annuity contract
under the settlement provisions contained therein.

STAR BANK - Star Bank, N.A. or any bank affiliated with it.

   
SUBACCOUNT - Subdivisions of VAA, each of which invests exclusively in shares
of a designated portfolio of the Fund or an Other Fund.

VALUATION PERIOD - The period of time from one determination of accumulation
unit and annuity unit values to their next determination. Such determination is
made at the same time that the net asset value of Fund Shares is determined. See
"Purchase and Redemption of Shares" in the accompanying Fund or Other Fund 
prospectus.
    

1940 ACT - The Investment Company Act of 1940, as amended, or any similar
successor federal legislation.



                                       2
<PAGE>   7


                                    FEE TABLE

<TABLE>
<CAPTION>
CONTRACTOWNER TRANSACTION EXPENSES
Deferred Sales Load (as a percentage of            YEARS       PAYMENT
                                                   -----       -------
    <S>                                        <C>               <C>
    value withdrawn; the                            1st          7%
    percentage varies with                          2nd          7%
    number of years from                            3rd          6%
    purchase payments to                            4th          5%
    which values relate)                            5th          4%
                                                    6th          2%
                                                    7th          1%
                                               8th and later     0%

Exchange (transfer) Fee                $3 (currently no charge for the first 4 transfers per year) 
Annual Contract Fee                    $35 (no fee if contract value exceeds $50,000) 
VAA ANNUAL EXPENSES (as a percentage
   of average account value)
Mortality and Expense Risk Fees                1.15%
Account Fees and Expenses                      0.25%
                                               -----
Total VAA Annual Expenses                      1.40%
</TABLE>

   
<TABLE>
<CAPTION>
FUND ANNUAL EXPENSES (after fee waiver*) 
     (as a percentage of the Fund's
      average net assets)                      MANAGEMENT        OTHER           TOTAL FUND
                                                 FEES           EXPENSES          EXPENSES
                                                ----           --------          --------
<S>                                           <C>              <C>               <C>
Equity                                          0.53%            0.14%             0.67%
Money Market*                                   0.25%            0.13%             0.38%
Bond                                            0.60%            0.18%             0.78%
Omni                                            0.55%            0.16%             0.71%
International                                   0.90%            0.32%             1.22%
Capital Appreciation                            0.80%            0.15%             0.95%
Small Cap                                       0.80%            0.14%             0.94%
Global Contrarian                               0.90%            0.42%             1.32%
Aggressive Growth                               0.80%            0.17%             0.97%
Strategic Income                                0.80%            0.50%             1.30%
Stellar                                         1.00%            0.54%             1.54%
Relative Value                                  0.90%            0.28%             1.18%
Emerging Markets*                               1.19%            0.56%             1.75%
</TABLE>
    

EXAMPLE - If you surrendered your contract at the end of the applicable time
period, you would pay the following aggregate expenses on a $1,000 investment in
each subaccount, assuming 5% annual return:

   
<TABLE>
<CAPTION>
                                            1 YEAR           3 YEARS           5 YEARS        10 YEARS
                                            ------           -------           -------        --------
                                        <C>              <C>               <C>              <C>   
Equity                                     $   87           $  121            $  150           $  252
Money Market*                                  84              113               136              222
Bond                                           88              124               156              264
Omni                                           87              122               152              256
International                                  92              137               177              307
Capital Appreciation                           90              129               164              281
Small Cap                                      90              129               163              280
Global Contrarian                              93              130               182              317
Aggressive Growth                              90              133               165              283
Strategic Income                               93              139               181              315
Stellar                                        95              146               192              337
Relative Value                                 92              136               175              303
Emerging Markets*                              97              152               202              357
</TABLE>
    


                                       3
<PAGE>   8


EXAMPLE - If you do not surrender your contract or you annuitize at the end of
the applicable time period, you would pay the following aggregate expenses on
the same investment:
   
<TABLE>
<CAPTION>
                                            1 YEAR           3 YEARS           5 YEARS         10 YEARS
                                            ------           -------           -------         --------
<S>                                        <C>              <C>              <C>              <C>    
Equity                                     $   22           $   69           $   117          $   252
Money Market*                                  19               60               103              222
Bond                                           23               72               123              264
Omni                                           23               70               119              256
International                                  28               85               145              307
Capital Appreciation                           25               77               132              281
Small Cap                                      25               77               131              280
Global Contrarian                              25               88               150              317
Aggressive Growth                              26               78               133              283 
Strategic Income                               29               87               149              315
Stellar                                        31               95               161              337
Relative Value                                 27               84               143              303
Emerging Markets*                              33              101               171              357
</TABLE>
    

   
The purpose of the above table is to help you to understand the costs and
expenses that a variable annuity contractowner will bear directly or indirectly.
THESE EXAMPLES SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR FUTURE
EXPENSE. ACTUAL EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN. Note that the
expense amounts shown in the examples are aggregate amounts for the total number
of years indicated. In the examples, the annual fee is treated as if it were
deducted as a percentage of assets, based upon the average account value for all
contracts, including ones from which a portion of the contract fee may be paid
from amounts invested in the Guaranteed Account. Neither the table nor the
examples reflect any premium taxes that may apply to a contract, which currently
range from 0% to 3.5%. The above table and examples reflect only the charges for
contracts currently offered by this prospectus and not other contracts that may
be offered by Ohio National Life. For further details, see DEDUCTIONS FOR STATE
PREMIUM TAX, page 8.

  *For the Money Market Portfolio, management fees in excess of 0.25% are
  presently being waived by the Fund's investment adviser. Without the waiver,
  the Money Market Portfolio's Management Fee would be 0.30%, its Total Fund
  Annual Expenses would be 0.43%, and its expenses would total $85 for a $1,000
  contract surrendered at the end of 1 year, $114 if surrendered at the end of 3
  years, $139 if surrendered at the end of 5 years or $227 if surrendered at the
  end of 10 years. For a $1,000 contract not surrendered, the expenses without
  the waiver would be $20 for 1 year, $61 for 3 years, $105 for 5 years or $227
  for 10 years. For the Emerging Markets Portfolio, 0.06% of the 1.25%
  management fee was waived by Montgomery Asset Management, L.P. in 1997.
  Without the waiver, the Emerging Markets Portfolio's Total Fund Annual
  Expenses would have been 1.81% and its expenses would total $98 for a $1,000
  contract surrendered at the end of 1 year, $153 if surrendered at the end of 3
  years, $204 if surrendered at the end of 5 years or $362 if surrendered at the
  end of 10 years. For a $1,000 contract not surrendered, the expenses without
  the waiver would be $34 for 1 year, $102 for 3 years, $174 for 5 years or $362
  for 10 years. 
    

                            Accumulation Unit Values


   
<TABLE>
<CAPTION>
Equity Subaccount

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                          <C>                        <C>                             <C>    
  1997*                      $10.000000                 $11.599062                       82,440
</TABLE>
    

   
<TABLE>
<CAPTION>
Money Market Subaccount **

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                          <C>                         <C>                              <C>    
  1997*                      $10.000000                  $10.388381                        65,172
</TABLE>
    


Bond Subaccount

   
<TABLE>
<CAPTION>
Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                          <C>                         <C>                             <C>   
  1997*                      $10.000000                  $10.791393                      12,183
</TABLE>
    


Omni Subaccount
<TABLE>
<CAPTION>
Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                          <C>                        <C>                             <C>    
  1997*                      $10.000000                 $11.608584                      102,587
</TABLE>


<TABLE>
<CAPTION>
International Subaccount

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                           <C>                         <C>                              <C>    
  1997*                       $10.000000                  $10.114943                        86,113
</TABLE>


<TABLE>
<CAPTION>
Capital Appreciation Subaccount

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                            <C>                      <C>                              <C>    
  1997*                        $10.000000               $11.366198                        93,956
</TABLE>


<TABLE>
<CAPTION>
Small Cap Subaccount

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                            <C>                      <C>                              <C>    
  1997*                        $10.000000               $10.854875                        54,898
</TABLE>


<TABLE>
<CAPTION>
Global Contrarian Subaccount

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                            <C>                      <C>                              <C>    
  1997*                        $10.000000               $11.036950                        16,423
</TABLE>


<TABLE>
<CAPTION>
Aggressive Growth Subaccount

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                            <C>                      <C>                                <C>   
  1997*                        $10.000000               $11.150420                         26,996
</TABLE>


<TABLE>
<CAPTION>
Strategic Income Subaccount

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                            <C>                       <C>                               <C>   
  1997*                        $10.000000                $10.724151                        100,248
</TABLE>


<TABLE>
<CAPTION>
Stellar Subaccount         

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                            <C>                       <C>                              <C>    
  1997*                        $10.000000                $10.818421                        56,527
</TABLE>

<TABLE>
<CAPTION>
Relative Value Subaccount

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                           <C>                        <C>                              <C>    
  1997*                       $10.000000                 $12.651115                       250,298
</TABLE>


<TABLE>
<CAPTION>
Emerging Markets Subaccount

Year ended                   Unit Value at           Unit Value at              Number of Units
December 31                Beginning of Year           End of Year               at End of Year
- -----------                -----------------           -----------               --------------
<S>                            <C>                       <C>                                <C>   
  1997*                        $10.000000                $ 9.788417                         32,560
</TABLE>



*   Series of variable annuity contracts commenced on January 3, 1997.

**The current annualized yield of the Money Market subaccount for the seven days
    ended December 31, 1997 was 4.09%.



                                       4
<PAGE>   9



                   THE OHIO NATIONAL FINANCIAL SERVICES GROUP

   
OHIO NATIONAL LIFE
Ohio National Life was organized under the laws of Ohio in 1909 as a stock life
insurance company and became a mutual life insurance company in 1959. It writes
life, accident and health insurance and annuities in 47 states, the District of
Columbia and Puerto Rico. Currently it has assets in excess of $6.3 billion and
equity in excess of $600 million. Its home office is located at One Financial
Way, Cincinnati, Ohio 45242.

OHIO NATIONAL VARIABLE ACCOUNT A
VAA was established in 1969 by Ohio National Life as a separate account under
Ohio law for the purpose of funding variable annuity contracts. Purchase
payments for the variable annuity contracts are allocated to one or more
subaccounts of VAA.  However, contract values may not be allocated to more than
10 variable subaccounts at any one time. Income, gains and losses, whether or
not realized, from assets allocated to VAA are, as provided in the contracts,
credited to or charged against VAA without regard to other income, gains or
losses of Ohio National Life. The assets maintained in VAA will not be charged
with any liabilities arising out of any other business conducted by Ohio
National Life. Nevertheless, all obligations arising under the contracts,
including the commitment to make annuity payments, are general corporate
obligations of Ohio National Life. Accordingly, all of Ohio National Life's
assets are available to meet its obligations under the contracts. VAA is
registered as a unit investment trust under the 1940 Act. 
    

The assets of the subaccounts of VAA are invested at net asset value (without
an initial sales charge) in shares of corresponding portfolios of the Fund:
the Equity Portfolio, Money Market Portfolio, Bond Portfolio, Omni Portfolio (a
flexible portfolio fund), International Portfolio, Capital Appreciation
Portfolio, Small Cap Portfolio, Global Contrarian Portfolio, Aggressive Growth
Portfolio, Strategic Income Portfolio, Stellar Portfolio (a growth and income
fund) or Relative Value Portfolio; assets of the Emerging Markets subaccount
are invested in shares of the Emerging Markets Fund.

   
OHIO NATIONAL FUND, INC.
The Fund is a diversified, open-end, management investment company registered
under the 1940 Act. The value of the Fund's investments fluctuates daily and is
subject to the risk of changing economic conditions as well as the risk inherent
in the ability of management to anticipate changes necessary in such investments
to meet changes in economic conditions. The Fund receives investment advice, for
a fee, from its investment adviser, Ohio National Investments, Inc., and from
Societe Generale Asset Management Corp. (sub-adviser to the International and
Global Contrarian Portfolios), T. Rowe Price Associates, Inc. (sub-adviser to
the Capital Appreciation Portfolio), Founders Asset Management LLC (sub-adviser 
to the Small Cap Portfolio), Strong Capital Management, Inc. (sub-adviser to
the Aggressive Growth Portfolio) and Star Bank (subadviser to the Strategic
Income, Stellar and Relative Value Portfolios). For additional information
concerning the Fund, including the investment objectives of each of its
portfolios, see the attached Fund prospectus. Read the Fund prospectus
carefully before investing. The Fund prospectus contains information about
other portfolios that are not available for the contract offered herein.
    


EMERGING MARKETS FUND
The Emerging Markets Fund is a series of The Montgomery Funds III, a registered,
open-end, investment company the shares of which are sold only to insurance
company separate accounts to fund variable annuity contracts and variable life
insurance policies. The Emerging Markets Fund is managed, for a fee, by
Montgomery Asset Management, L.P. The value of Emerging Markets fund investments
fluctuates daily and is subject to the risk of changing economic conditions as
well as the risk inherent in the ability of management to anticipate changes
necessary in those investments to meet changes in economic conditions. For
additional information concerning the Emerging Markets Fund, including its
investment objectives, see its accompanying prospectus. Read the prospectus
carefully before investing. (It contains information about other funds that are
not available for the contract offered herein.)





                                       5
<PAGE>   10



MIXED AND SHARED FUNDING
In addition to being offered to VAA, shares of the Fund are currently offered to
other separate accounts of Ohio National Life in connection with variable
annuity contracts and a separate account of Ohio National Life Assurance
Corporation in connection with variable life insurance contracts. In the future,
shares of the Fund may be offered to other insurance company separate accounts.
Shares of the Emerging Markets Fund are presently offered to variable annuity
and variable life insurance separate accounts of other unaffiliated life
insurance companies. It is conceivable that in the future it may become
disadvantageous for both variable life and variable annuity separate accounts or
for separate accounts of other life insurance companies to invest in Fund
Shares. Although neither Ohio National Life nor the Fund currently foresees any
such disadvantage, the Board of Directors of the Fund and of each Other Fund
will monitor events in order to identify any material conflict between different
types of contractowners and to determine what action, if any, should be taken in
response thereto, including the possible withdrawal of VAA`s participation in
the Fund or Other Fund. Material conflicts could result from such things as (1)
changes in state insurance law; (2) changes in federal income tax law; (3)
changes in the investment management of any portfolio of the Fund; or (4)
differences between voting instructions given by different types of
contractowners.


VOTING RIGHTS
Ohio National Life shall vote Fund Shares held in VAA at meetings of
shareholders of the Fund or of any Other Fund in accordance with voting
instructions received from contract owners. The number of Fund Shares for which
an owner is entitled to give instructions will be determined by Ohio National
Life in the manner described below, not more than 90 days prior to the meeting
of shareholders. Proxy material will be distributed to each owner together with
appropriate forms for giving voting instructions. Fund Shares held in VAA, for
which no timely instructions are received, will be voted by Ohio National Life
in proportion to the instructions which are received with respect to all
contracts participating in VAA.

During the accumulation period, the number of Fund Shares for which instructions
may be given to Ohio National Life is determined by dividing the variable
accumulation value of a subaccount of the contract by the net asset value of a
share of the corresponding portfolio of the Fund or Other Fund as of the same
date. During the annuity payment period, the number of Fund Shares for which
such instructions may be given is determined by dividing the actuarial liability
for variable annuities in the course of payment by the net asset value of a Fund
Share as of the same date. Generally, the number of votes tends to decrease as
annuity payments progress.


                   DISTRIBUTION OF VARIABLE ANNUITY CONTRACTS

   
The variable annuity contracts are sold by Ohio National Life insurance agents
who are also registered representatives of (a) MDS Securities, Inc. ("MDS"), (b)
The O.N. Equity Sales Company ("ONESCO"), a wholly-owned subsidiary of Ohio
National Life, or (c) other broker-dealers that have entered into distribution
agreements with Ohio National Equities, Inc. ("ONEQ," another wholly-owned
subsidiary of Ohio National Life) which is the principal underwriter of the
contracts. Each of ONEQ, MDS, ONESCO and the other broker-dealers is registered
under the Securities Exchange Act of 1934 and a member of the National
Association of Securities Dealers, Inc. Ohio National Life pays ONEQ 6.75% of
purchase payments. ONEQ then pays a portion of that amount to MDS, ONESCO and
the other broker-dealers as compensation for their sales efforts. MDS, ONESCO
and the other broker-dealers will remunerate their registered representatives
from their own funds. Purchase payments on which no compensation is paid to
registered representatives may not be included in amounts on which the sales
compensation will be paid to ONEQ. To the extent that the amount of the
contingent deferred sales charge received by Ohio National Life is not
sufficient to recover the fee paid to ONEQ, any deficiency will be made up from
Ohio National Life's general account assets which include, among other things,
any profit from the mortality and expense risk charges.  
    


                                       6
<PAGE>   11


                             DEDUCTIONS AND EXPENSES

CONTINGENT DEFERRED SALES CHARGE
No deduction for sales expense is made from purchase payments. A contingent
deferred sales charge may be assessed by Ohio National Life when a contract is
surrendered or a partial withdrawal is made to defray expenses relating to the
sale of the contract, including compensation to sales personnel, cost of sales
literature and prospectuses, and other expenses related to sales activity. The
charge equals a percentage of the amount withdrawn. This percentage will vary
with the number of years from the date the purchase payments were made 
(starting with the first purchase payment) as follows:

<TABLE>
<CAPTION>
                         YEARS                    PAYMENT
                         -----                    -------
                     <S>                            <C>
                          1st                       7%
                          2nd                       7%
                          3rd                       6%
                          4th                       5%
                          5th                       4%
                          6th                       2%
                          7th                       1%
                     8th and later                  0%
</TABLE>

   
Partial withdrawals of not more than 10% of the accumulation value (after the
first contract anniversary, this is the accumulation value as of the last day
of the prior contract year) may be made without the imposition of the
contingent deferred sales charge. During the first contract year, only one
withdrawal may be made without the charge. If less than 10% is withdrawn in a
year the remainder of that 10% may be carried into future years. But, you can
never carry over more than 30% of the year-end accumulation value for this      
purpose and you can never withdraw more than 30% of the previous year-end
accumulation value without a charge. The charge will not be imposed when the
values of one or more contracts owned by the trustee of a retirement plan
qualifying under Section 401, 403(b) or 457 of the Code are transferred to a
group annuity contract issued by Ohio National Life. If the contract owner uses
values of at least $250,000 from an Ohio National Life fixed annuity to provide
the purchase payment for a contract offered by this prospectus, this contract
will be treated (for purposes of determining the contingent deferred sales
charge) as if it were issued at the same time as the fixed annuity and as if
the purchase payment made for the fixed annuity had been made for this
contract.
    

CONTRACT ADMINISTRATION CHARGE
Each year on the contract anniversary (or at the time of surrender of the
contract), Ohio National Life will deduct a contract administration charge of
$35 from the accumulation value to reimburse it for the expenses relating to the
maintenance of the contract. This charge is not designed to produce a profit and
Ohio National Life does not expect to recover from the charge any amount in
excess of accumulated administrative expenses. There is no contract
administration charge (a) for contracts having a value of at least $50,000 on
the contract anniversary or (b) after the annuity payout date. Ohio National
Life guarantees not to change the contract administration charge.  The charge
is not made after the annuity payout date.


DEDUCTION FOR ADMINISTRATIVE EXPENSES
A deduction is made at the end of each valuation period equal to 0.25% on an
annual basis of the contract value for administrative expenses. This deduction
is not designed to produce a profit but to reimburse Ohio National Life for
expenses incurred for accounting, auditing, legal, contract owner services,
reports to regulatory authorities and contract owners, contract issue, etc., not
covered by the contract administration charge.


DEDUCTION FOR RISK UNDERTAKINGS
Prior to the annuity payout date, Ohio National Life guarantees that the
accumulation value of all contracts will not be affected by any excess of sales
and administrative expenses over the deductions provided therefor. Ohio National
Life also guarantees to pay a death benefit in the event of the annuitant's
death prior to the annuity payout date (see Death Benefit, page 11). After the
annuity payout date, Ohio National Life guarantees that variable annuity
payments will not be affected by adverse mortality experience or expenses.

For assuming these risks, Ohio National Life, in determining the accumulation
unit values and the annuity unit values for each subaccount, makes a deduction
from the applicable investment results equal to 1.15% of the contract value on
an annual basis. That deduction may be decreased by Ohio National Life at any
time but may not be increased to more than 1.15% on an annual basis. Although
Ohio National Life views the risk charge as an indivisible whole, of the amount
currently being deducted, it has estimated that a reasonable allocation would be
0.65% for mortality risk, and


                                       7
<PAGE>   12


0.50% for expense risk. Although Ohio National Life hopes to realize a profit
from this charge, if the deduction is insufficient to cover the actual risk
involved, the loss will fall on Ohio National Life; conversely, if the deduction
proves more than sufficient, the excess will be a gain to Ohio National Life.


TRANSFER FEE
A transfer fee of $3 (which may be increased to $15) is made for each transfer
from one subaccount to another. The fee is charged against the subaccount from
which the transfer is effected. No fee is charged for the first four transfers
each year.


   
DEDUCTION FOR STATE PREMIUM TAX 
Most states do not presently charge a premium   tax for these contracts. Where
a tax applies, the rates for tax-qualified contracts are presently 0.5% in
California, 1.0% in Puerto Rico and West Virginia, 2.0% in Kentucky and 2.25%
in the District of Columbia. For non-tax-qualified contracts, the rates are
presently 1.0% in Puerto Rico, West Virginia and Wyoming, 1.25% in the South
Dakota, 2.0% in Kansas, Kentucky and Maine, 2.25% in the District of Columbia,
2.35% in California and 3.5% in Nevada. The deduction for premium taxes will be 
made when incurred. Normally, that is not until annuity payments begin.
However, in Kansas, South Dakota and Wyoming, they are presently being deducted
from purchase payments. 
    


FUND EXPENSES
There are deductions from, and expenses paid out of, the assets of the Fund and
of any Other Fund. These are described in the accompanying prospectuses of the
Fund and of the Emerging Markets Fund.


                    DESCRIPTION OF VARIABLE ANNUITY CONTRACTS

20-DAY FREE LOOK
The contract owner may revoke the contract at any time until the end of 20 days
after receipt of the contract and receive a refund of the entire purchase price.
To revoke, the owner must return the contract to Ohio National Life within the
20 day period. In those states where required by state law, the value of the
contract as of the date of cancellation will be returned in lieu of the entire
purchase price in case of revocation during the 20 day free look period.


   
ACCUMULATION PERIOD 
PURCHASE PAYMENT PROVISIONS 
The contracts provide for minimum initial purchase payments of $2,000 for
tax-qualified contracts and $5,000 for non-tax qualified contracts, and minimum
subsequent payments of $500. Ohio National Life permits smaller payments (of at
least $100) in the case of automatic bank draft arrangements, payroll deductions
or employee benefit plans. Ohio National Life reserves the right to restrict
total purchase payments in excess of $1,000,000. Subject to these limits,
payments may be made at any time. Failure to make payments shall  not constitute
a default, but could result in involuntary termination (see Ohio National Life's
Right to Terminate, page 9).
    


ACCUMULATION UNITS
Prior to the annuity payout date, the contract value is measured by accumulation
units. Each purchase payment results in the crediting of accumulation units to
the contract (see Crediting Accumulation Units, page 9). The number of
accumulation units so credited remains constant but the dollar value of
accumulation units will vary depending upon the investment results of the
particular subaccount to which payments are allocated.




                                       8
<PAGE>   13


   
CREDITING ACCUMULATION UNITS
Application forms or orders, together with the first purchase payment, are
forwarded to the home office of Ohio National Life for acceptance. Upon
acceptance, a contract is issued to the contract owner, and the first purchase
payment is then credited to the contract in the form of accumulation units.
Initial purchase payments are credited not later than two business days after
receipt if all information necessary for issuing a contract and processing the
purchase payment are complete. If this cannot be done within five business
days, the purchase payment will be returned immediately to the applicant unless
the applicant specifically consents to having Ohio National Life retain the
purchase payment until the necessary information is completed. After that,      
the purchase payment will be credited within two business days. Subsequent
purchase payments are sent directly to the home office of Ohio National Life
and are applied to provide that number of accumulation units (for each
subaccount) determined by dividing the amount of the purchase payment by the
value of the appropriate accumulation unit next computed after the payment is
received at the home office of Ohio National Life.


ALLOCATION OF PURCHASE PAYMENTS
You may direct the allocation of your purchase payments among up to 10 variable
subaccounts of VAA and the Guaranteed Account. The amount allocated to any
subaccount or the Guaranteed Account must equal a whole percentage. The 
allocation of future purchase payments may be changed at any time upon written
notice to the home office of Ohio National Life.
    

ACCUMULATION UNIT VALUE AND ACCUMULATION VALUE
The accumulation unit value of each subaccount of VAA was set at $10 when the
first payment for these contracts was allocated to each subaccount. The
accumulation unit value for any subsequent valuation period is determined by
multiplying the accumulation unit value for the immediately preceding valuation
period by the net investment factor (described below) for such subsequent
valuation period. The accumulation value is determined by multiplying the total
number of accumulation units (for each subaccount) credited to the contract by
the accumulation unit value (for such subaccount) for the valuation period for
which the accumulation value is being determined.


NET INVESTMENT FACTOR
The net investment factor is a quantitative measure of the investment results of
each subaccount of VAA. The net investment factor for each subaccount for any
valuation period is determined by dividing (a) by (b), then subtracting (c) from
the result, where:

 (a)  is -
     (1) the net asset value of the corresponding Fund Share determined as of
         the end of a valuation period, plus
     (2) The per share amount of any dividends or other distributions declared
         for that portfolio by the Fund or an Other Fund if the "ex-dividend"
         date occurs during the valuation period, plus or minus
     (3) per share charge or credit for any taxes paid or reserved for which is
         determined by Ohio National Life to result from the maintenance or
         operation of that subaccount of VAA; (No federal income taxes are
         applicable under present law.)
 (b)  is the net asset value of the corresponding Fund Share determined at the
      end of the preceding valuation period; and
 (c)  is the deduction for administrative and sales expenses and risk
      undertakings. (See Deduction for Administrative Expenses, page 7, and,
      Deduction for Risk Undertakings, page 7.)

OHIO NATIONAL LIFE'S RIGHT TO TERMINATE
Ohio National Life may, at its option, require surrender of a contract on any
anniversary when the accumulation value is less than $1,000. Such termination
could have adverse tax consequences. (See Federal Tax Status, page 14.) Such
termination will not be made on an individual retirement annuity (IRA) if a
purchase payment has been made during the preceding two years, nor will it be
made on an annuity funding a Section 403(b) salary reduction agreement.




                                       9
<PAGE>   14


SURRENDER AND PARTIAL WITHDRAWAL
Prior to the annuity payout date, or thereafter in the case of annuity Option
1(e) described below, the owner of a contract may surrender (totally
withdraw the value of) his or her contract for its accumulation value or elect a
partial (at least $100) withdrawal therefrom. These transactions may be subject
to the contingent deferred sales charge described on page 7. That charge is a
percentage of the total amount withdrawn. For example, if a partial withdrawal
of $100 is requested during the first two years after the first purchase payment
for which there are contract values, Ohio National Life would pay you $100, but
the total amount deducted from the accumulation value would be $107.53 (i.e.,
$107.53 x 7% = $7.53). Unless otherwise specified, the withdrawal will be made
pro-rata from the values of each subaccount. The amount available for withdrawal
is the sum of the subaccount values less the contingent deferred sales charge,
if any. In the case of a complete surrender, the amount payable is also reduced
by the amount of the contract administration charge. Payment by Ohio National
Life shall be made within seven days from the date of receipt of the request for
such payment except as it may be deferred under the circumstances described
below. Surrenders and partial withdrawals are limited or not permitted in
connection with certain retirement plans. See Tax Deferred Annuities, page 16.
For tax consequences of a surrender or withdrawal, see Federal Tax Status, page
14.

Occasionally Ohio National Life may receive a request for a surrender or partial
withdrawal which includes contract values derived from purchase payments which
have not cleared the banking system. Ohio National Life may delay mailing that
portion which relates to such payments until the check for the purchase payment
has cleared. Ohio National Life requires the return of the contract in the case
of a complete surrender.

The right to withdraw may be suspended or the date of payment postponed (1) for
any period during which the New York Stock Exchange is closed (other than
customary weekend and holiday closings) or during which trading on the Exchange,
as determined by the Securities and Exchange Commission, is restricted; (2) for
any period during which an emergency, as determined by the Commission, exists as
a result of which disposal of securities held in the Fund or Other Fund is not
reasonably practical, or it is not reasonably practical to determine the value
of the Fund's or Other Fund's net assets; or (3) or such other periods as the
Commission may by order permit for the protection of security holders.

TRANSFERS AMONG SUBACCOUNTS
Contract values may be transferred from one subaccount to another upon the
request of the owner. Transfers may be made at any time during the accumulation
period. The amount of any such transfer must be at least $300 (or the entire
value of the contract's interest in a subaccount, if less). Ohio National Life
reserves the right to limit the number, frequency, method or amount of
transfers. Transfers from any portfolio of the Fund or Other Fund on any one day
may be limited to 1% of the previous day's total net assets of that portfolio if
Ohio National Life or the Fund or Other Fund in its or their discretion,
believes that the portfolio might otherwise be damaged. If and when transfers
must be so limited, some transfer requests will not be made. In determining
which requests will be made, scheduled transfers (pursuant to a pre-existing DCA
program) will be made first, followed by mailed written requests in the order
postmarked and, lastly, telephone and facsimile requests in the order received.
Contract owners whose transfer requests are not made will be so notified.
Current SEC rules preclude us from processing at a later date those requests
that were not made. Accordingly, a new transfer request would have to be
submitted in order to make a transfer that was not made because of these
limitations. After the annuity payout date, transfers among subaccounts can only
be made once each calendar quarter. Such transfers may then be made without a
transfer fee. (See Transfer Fee, page 8, and Transfers After Annuity Payout
Date, page 13). Not more than 20% of a contract's guaranteed accumulation value 
(or $1,000, if greater) as of the beginning of a contract year may be 
transferred to variable subaccounts during that contract year.

   
SCHEDULED TRANSFERS (DOLLAR COST AVERAGING) Ohio National Life administers a
scheduled transfer ("DCA") program enabling you to preauthorize automatic
monthly or quarterly transfers of a specified dollar amount of at least $300,
(a) from any variable subaccount(s) to any other subaccount(s), including the
Guaranteed Account, or (b) from the Guaranteed Account to any variable  
subaccount(s) if the DCA program is scheduled to begin within 6 months of
contract issue and the term of the DCA program does not exceed 2 years. For
transfers from variable subaccounts, at least 12 transfers must be scheduled
and the term of the DCA program may not exceed 5 years. No transfer fee is
charged for DCA transfers. Ohio National Life may discontinue the DCA program
at any time. You may also discontinue further DCA transfers by giving Ohio
National Life written notice at least 7 business days before the next scheduled
transfer. 
    

                                       10
<PAGE>   15


   
DCA generally has the effect of reducing the risk of purchasing at the top, and
selling at the bottom, of market cycles. DCA transfers from the Guaranteed      
Account or from a fund with a stabilized net asset value, such as the Money
Market subaccount, will generally reduce the average total cost of indirectly
purchasing Fund Shares because greater numbers of shares will be purchased when
the share prices are lower than when prices are higher. However, DCA does not
assure you of a profit, nor does it protect against losses in a declining
market. Moreover, for transfers from a subaccount not having a stabilized net
asset value, DCA will have the effect of reducing the average price of the
shares being redeemed. DCA might also be used to systematically transfer
accumulation values from variable subaccounts to the Guaranteed Account, in
anticipation of retirement, in order to reduce the  risk of making a single
transfer during a low market.

TELEACCESS
If the contract owner first submits a pre-authorization form to Ohio National
Life, contract and unit values and interest rates can be checked and transfers
may be made by telephoning Ohio National Life between 7:00 a.m. and 7:00 p.m.
(Eastern time) on days that it is open for business, at 1-800-366-6654, #8. Ohio
National Life will honor pre-authorized telephone transfer instructions from
anyone who is able to provide the personal identifying information requested via
TeleAccess. Telephone transfer requests will not be honored after the
annuitant's death. For added security, transfers are confirmed in writing sent
to the owner on the next business day. However, if a transfer cannot be
completed as requested, a customer service representative will contact the owner
in writing sent within 48 hours of the TeleAccess request.
    
   
NURSING FACILITY CONFINEMENT

No contingent deferred sales charge will be charged on partial withdrawals of up
to $5,000 per month if the annuitant is, or has been, confined to a state
licensed or legally operated in-patient nursing home facility for at least 60
consecutive days. The total amount withdrawn may not exceed one half of the
contract value as of the beginning of the confinement. This waiver of the
contingent deferred sales charge may not be available in all states. It only
applies when: (1) the confinement begins after the first contract anniversary
and before annuity payments begin; (2) the contract was issued before the
annuitant's 80th birthday, and (3) the request for withdrawal, together with
proof of the confinement, is received at Ohio National Life's home office while
the annuitant is confined or within 90 days after discharge from the facility.
    

DEATH BENEFIT                            
In the event of the death of the annuitant and any contingent annuitant prior
to the annuity payout date, the contract provides a death benefit to be paid to
a designated beneficiary. (This death benefit is not available on any contract
purchased through a bank in Puerto Rico.) The amount of the death benefit will
be determined as of the date of the annuitant's death. It will be paid to the
beneficiary in a single sum unless the owner or beneficiary elects settlement
under one or more of the settlement options provided in the contract.  The
death benefit will be the contract value if, (a) on the date of death or (b) as
of any contract anniversary date, the sum of all withdrawals exceeds the        
remaining contract value. Otherwise, the death benefit will be the greatest of:
(a) the contract value; or (b) the net of purchase payments less withdrawals
accumulated at an annual effective interest rate of 4% until the annuitant
attains age 75 and 0% after that; or (c) the stepped-up death benefit amount if
the contract has been in effect for at least 7 years. For the 7-year period
beginning on the seventh contract anniversary, the stepped-up death benefit
will be the greater of (i) the contract value as of the seventh anniversary or
(ii) the net of purchase payments less withdrawals made on or before the
seventh anniversary. At the beginning of each later 7-year period (until the
annuitant attains age 75), the stepped up death benefit will be the greater of
(i) the contract value on that date or (ii) the death benefit as of the last
day of the preceding 7-year period. The stepped-up death benefit amount is
increased by purchase payments and decreased by withdrawals made during each
7-year period after the seventh anniversary.

   
OHIO NATIONAL LIFE EMPLOYEE DISCOUNT
Ohio National Life and its affiliated companies offer a credit on the purchase
of contracts by any of their employees, directors or retirees, or their spouse
or the surviving spouse of a deceased retiree, covering any of the foregoing or
any of their minor children, or any of their children ages 18 to 21 who is
either (i) living in the purchaser's household or (ii) a full-time college
student being supported by the purchaser, or any of the purchaser's minor
grandchildren under the Uniform Gifts to Minors Act. This credit is treated as
additional income under the contract. The amount of the credit equals 3.2% of
all purchase payments made in the first contract year and 5.5% of purchase
payments made in the second through sixth contract years. Ohio National Life
credits the Guaranteed Accumulation Account of the eligible person's contract 
in the foregoing amounts at the time of each payment made by the eligible 
person.
    


                                       11
<PAGE>   16



   
ANNUITY PERIOD
ANNUITY PAYOUT DATE
Annuity payments under a contract will begin on the annuity payout date. This
date is selected by the owner at the time the contract is issued and must be at
least 30 days after the contract date. It may be changed from time to time by
the owner so long as the annuity payout date selected is the first day of any
month at least 30 days after the date of such change. The contract restricts the
annuity payout date to not later than the first of the month following the
annuitant's 90th birthday; however, this restriction may be modified by
applicable state law or it may be waived by mutual agreement between Ohio 
National Life and the owner.
    

   
The contracts include Ohio National Life's assurance (except for option 1(e),
below) that annuity payments will be paid for the lifetime of the annuitant
(and joint annuitant, if any) in accordance with the annuity rates contained in
the contract, regardless of actual mortality experience.
    

Other than in connection with annuity Option 1(e) described below, once annuity
payments commence, the contract cannot be surrendered for cash except that,     
upon the death of the annuitant, the beneficiary shall be entitled to surrender
the contract for the commuted value of any remaining period-certain payments. 
Surrenders and partial withdrawals from annuity Option 1(e) are permitted at any
time.

ANNUITY OPTIONS
The owner may elect one or more of the following annuity options, and may change
such election anytime before the annuity payout date. 
Option 1(a):  Life Annuity with installment payments for the lifetime of the 
              annuitant (under this option it is possible for the annuitant to
              receive only one payment; this could happen if the annuitant 
              should die before receiving the second payment; there is no 
              residual value of the contract after annuitant's death).
Option 1(b):  Life Annuity with installment payments guaranteed for five years
              and continuing thereafter during the remaining lifetime of the 
              annuitant.
Option 1(c):  Life Annuity with installment payments guaranteed for ten years 
              and continuing thereafter during the remaining lifetime of
              the annuitant.
Option 1(d):  Installment Refund Life Annuity with payments guaranteed for
              a period certain and continuing thereafter during the remaining
              lifetime of the annuitant. The number of period-certain payments
              is equal to the amount applied under this option divided by the
              amount of the first payment.
Option 1(e):  Installment Refund Annuity with payments guaranteed for a fixed 
              number (up to thirty) of years. This option is available for
              variable annuity payments only. Although the deduction for risk
              undertakings is taken from annuity unit values, Ohio
              National Life has no mortality risk during the annuity payout
              period under this option.
Option 2(a):  Joint & Survivor Life Annuity with installment payments during 
              the lifetime of an annuitant and continuing during the lifetime
              of a designated contingent annuitant (under this option it is 
              possible for the annuitant and contingent annuitant to receive 
              only one payment; this could happen if both were to die  before 
              receiving the second payment).
Option 2(b):  Joint & Survivor Life Annuity with installment payments 
              guaranteed for ten years and continuing thereafter during the
              remaining lifetime of the annuitant or a designated contingent
              annuitant.
Other settlement options are available as agreed to by Ohio National Life.

Unless the contract owner directs otherwise, as of the annuity payout date the
contract values will be applied to provide annuity payments pro-rata from each
subaccount in the same proportion as the contract values immediately prior to
the annuity payout date.

If no election is in effect on the annuity payout date, the accumulation value
of the contract will be applied under Option 1(c) (except that certain contracts
might require a Joint and Survivor Annuity pursuant to the Pension Reform Act of
1974, as amended) with the beneficiary as payee for any remaining period-certain
installments payable after the death of the annuitant. Options 2(a) and 2(b) are
available only with the consent of Ohio National Life if the contingent
annuitant is not related to the annuitant.

   
The Internal Revenue Service has not ruled on the tax treatment of a commutable 
variable annuity. If you select Option 1(e), it is possible that the IRS could 
determine that the entire value of the annuity is fully taxable at the time you 
elect Option 1(e) or that variable annuity payments under this option should 
not be taxed under the annuity rules (see Federal Tax Status, page 15), which 
could result in your payments being fully taxable to you. Should the IRS so 
rule, Ohio National Life may be required to tax report up to the full value of 
the annuity to you as taxable income.
    


                                       12
<PAGE>   17



DETERMINATION OF AMOUNT OF THE FIRST VARIABLE ANNUITY PAYMENT
The first variable annuity payment is determined by applying the accumulation
value for each subaccount in accordance with the settlement option tables
contained in the contract. The rates contained in those tables depend upon the
annuitant's (and any contingent annuitant's) age and sex and the option
selected. Contracts issued to plans sponsored by employers subject to Title VII
of the Civil Rights Act of 1964 or similar state statutes use annuity tables
which do not vary with annuitant's sex. The accumulation value to be applied is
determined at the end of a valuation period (selected by Ohio National Life and
uniformly applied) not more than 10 valuation periods before the annuity payout
date.

   
If the amount to be applied under an option is less than $5,000, the option
shall not be available and the accumulation value shall be paid in a single sum
to the annuitant. If the first periodic payment under any option would be less
than $25, Ohio National Life reserves the right to change the frequency of
payments so that the first such payment is at least $25.
    

ANNUITY UNIT AND THE DETERMINATION OF SUBSEQUENT PAYMENTS
Subsequent variable annuity payments will vary to reflect the investment
performance of each applicable subaccount. The amount of each subsequent payment
is determined by annuity units. The number of annuity units for each subaccount
is determined by dividing the dollar amount of the first annuity payment from
each subaccount by the value of the subaccount annuity unit for the same
valuation period used to determine the accumulation value of the contract
applied to provide annuity payments. This number of annuity units remains fixed
during the annuity payment period unless changed as provided below.

The annuity unit value for each subaccount was set at $10 for the valuation
period as of which the first variable annuity payable from each subaccount of
VAA was calculated. The annuity unit value for each subsequent valuation period
equals the annuity unit value for the immediately preceding valuation period
multiplied by the net investment factor (see page 9) for such subsequent
valuation period and by a factor (0.9998925 for a one-day valuation period) to
neutralize the assumed interest rate discussed below.

The dollar amount of each subsequent variable annuity payment is equal to the
fixed number of annuity units for each subaccount multiplied by the value of the
annuity unit for the valuation period.

The annuity rate tables contained in the contracts are based on the Progressive
Annuity Mortality Table with compound interest at the effective rate of 4% per
year. A higher interest assumption would mean a higher initial annuity payment
but a more slowly rising series of subsequent annuity payments if annuity unit
values were increasing (or a more rapidly falling series of subsequent annuity
payments if annuity unit values were decreasing). A lower interest assumption
would have the opposite effect. If the actual net investment rate were equal to
the assumed interest rate, annuity payments would be level.

TRANSFERS AFTER ANNUITY PAYOUT DATE
After annuity payments have been made for at least 12 months, the annuitant can,
once each calendar quarter, change the subaccount(s) on which variable annuity
payments are based. On at least 30 days written notice to Ohio National Life at
its home office, that portion of the periodic variable annuity payment directed
by the annuitant will be changed to reflect the investment results of a
different subaccount. The annuity payment immediately after such change will be
the amount that would have been paid without such change. Subsequent payments
will reflect the new mix of subaccount allocation.


OTHER CONTRACT PROVISIONS
ASSIGNMENT
Any amount payable in settlement of the contracts may not be commuted,
anticipated, assigned or otherwise encumbered, or pledged as loan collateral to
any person other than Ohio National Life. To the extent permitted by law, no
such amounts shall be subject in any way to any legal process to subject them to
payment of any claims against an annuitant before the annuity payout date. A
tax-qualified contract may not, but a non-tax-qualified contract may, be
collaterally assigned before the annuity payout date. Ownership of a
tax-qualified contract may not be transferred


                                       13
<PAGE>   18


except to (1) the annuitant, (2) a trustee or successor trustee of a pension or
profit-sharing trust which is qualified under Section 401 of the Code, or (3)
the employer of the annuitant provided that the contract after transfer is
maintained under the terms of a retirement plan qualified under Section 403(a)
of the Code for the benefit of the annuitant, or (4) as otherwise permitted by
laws and regulations governing plans for which the contract may be issued.
Ownership of a non-tax-qualified contract may be transferred.


PERIODIC REPORTS
Ohio National Life will furnish each owner, once each calendar quarter prior to
the annuity payout date, a statement showing the number of accumulation units
credited to the contract by subaccount and the accumulation unit value of each
such unit as of the end of the preceding quarter. In addition, as long as the
contract remains in effect, Ohio National Life will forward any periodic reports
of the Fund or Other Fund.


SUBSTITUTION FOR FUND SHARES
If investment in the Fund or Other Fund is no longer possible or in Ohio
National Life's judgment becomes inappropriate to the purposes of the contract,
Ohio National Life may substitute one or more other mutual funds. Substitution
may be made with respect to both existing investments and the investment of
future purchase payments. However, no such substitution will be made without any
necessary approval of the Securities and Exchange Commission. We may also add
other investment portfolios of the Fund or of additional Other Funds as eligible
investments of VAA.


   
CONTRACT OWNER INQUIRIES
Any questions from contract owners should be directed to Ohio National Life,
Variable Annuity Administration, P.O. Box 2669, Cincinnati, Ohio 45201;
telephone 1-800-366-6654 (8:30 a.m. to 4:30 p.m., Eastern time).
    


PERFORMANCE DATA
Ohio National Life may advertise performance data for the various portfolios of
the Fund or Other Fund showing the percentage change in the value of an
accumulation unit based on the performance of the applicable portfolio over a
period of time (usually a calendar year). Such percentage change is determined
by dividing the increase (or decrease) in value for the unit by the accumulation
unit value at the beginning of the period. This percentage figure will reflect
the deduction of any asset-based charges under the contract but will not reflect
the deduction of any applicable contract administration charge or contingent
deferred sales charge. The deduction of any applicable contract administration
charge or contingent deferred sales charge would reduce any percentage increase
or make greater any percentage decrease.

Any such advertising will also include average annual total return figures
calculated as shown in the Statement of Additional Information. The average
annual total return figures will reflect the deduction of applicable contract
administration charges and contingent deferred sales charges as well as
applicable asset-based charges.

   
Ohio National Life may also distribute sales literature comparing separate
account performance to the Consumer Price Index or to such established market
indexes as the Dow Jones Industrial Average, the Standard & Poor's 500 Stock
Index, IBC's Money Fund Reports, Lehman Brothers Bond Indices, the Morgan
Stanley Europe Australia Far East Index, Morgan Stanley World Index, Russell
2000 Index, or other variable annuity separate accounts or mutual funds with
investment objectives similar to those of the subaccounts.
    





                                       14
<PAGE>   19



                               FEDERAL TAX STATUS

The following discussion of federal income tax treatment of amounts received
under a variable annuity contract is not exhaustive, does not purport to cover
all situations, and is not intended as tax advice. A qualified tax adviser
should always be consulted with regard to the application of law to individual
circumstances. Tax laws can change, even with respect to contracts that have
already been issued. Tax law revisions, with unfavorable consequences to
contracts offered by this prospectus, could have retroactive effect on
previously issued contracts or on subsequent voluntary transactions in
previously issued contracts.

Ohio National Life is taxed as a life insurance company under Subchapter L of
the Internal Revenue Code (the "Code"). Since the operations of VAA are a part
of, and are taxed with, the operations of Ohio National Life, VAA is not
separately taxed as a "regulated investment company" under Subchapter M of the
Code.

As to tax-qualified contracts, no federal income tax is payable under present
law on dividend income or capital gains distributions from Fund Shares held in
VAA or upon capital gains realized by VAA on redemption of Fund Shares. When a
non-tax-qualified contract is issued in connection with a deferred compensation
plan or arrangement, all rights, discretions and powers relative to the contract
are vested in the employer and you must look only to your employer for the
payment of deferred compensation benefits. Generally, in that case, an annuitant
will have no "investment in the contract" and amounts received by you from your
employer under a deferred compensation arrangement will be taxable in full as
ordinary income in the year of receipt.

   
The contracts described in this prospectus are considered annuity contracts
under Section 72 of the Code, which generally provides for taxation of
annuities. Under existing provisions of the Code, any increase in the
accumulation value of the contract is not taxable to you as the owner or
annuitant until you receive it, either in the form of annuity payments, as
contemplated by the contract, or in some other form of distribution (provided
that the owner of a non-tax qualified contract must be a natural person for this
purpose). With certain exceptions, where the owner of a non-tax qualified
contract is a non-natural person (corporation, partnership or trust) any
increase in the accumulation value of the contract attributable to purchase
payments made after February 28, 1986 will be treated as ordinary income
received or accrued by the contract owner during the current tax year.
    

When annuity payments commence under the contract each payment is taxable under
Section 72 of the Code as ordinary income in the year of receipt if the
annuitant has neither paid any portion of the purchase payments for the contract
nor has previously been taxed on any portion of the purchase payments. If any
portion of the purchase payments has been paid from or included in your taxable
income, this aggregate amount will be considered your "investment in the
contract." You will be entitled to exclude from your taxable income a portion of
each annuity payment equal to your "investment in the contract" divided by the
period of expected annuity payments, determined by your life expectancy and the
form of annuity benefit. Once your "investment in the contract" is recovered,
the entire portion of each annuity payment will be included in your taxable
income.

If an election is made to receive the accumulated value in a single sum in lieu
of annuity payments, any amount received or withdrawn in excess of the
"investment in the contract" will normally be taxed as ordinary income in the
year received. A partial withdrawal of contract values is taxable as income to
the extent that the accumulated value of the contract immediately before the
payment exceeds the "investment in the contract." Such a withdrawal is treated
as a distribution of earnings first and only second as recovery of your
"investment in the contract". Any part of the value of the contract that is
assigned or pledged to secure a loan will be taxed as if it had been a partial
withdrawal and may be subject to a penalty tax.

There is a penalty tax equal to 10% of any amount that must be included in gross
income for tax purposes. The penalty will not apply to a redemption that is (1)
received on or after the taxpayer reaches age 59 1/2; (2) made to a beneficiary
on or after the death of the annuitant; (3) attributable to the taxpayer's
becoming disabled; (4) made as a series of substantially equal periodic payments
for the life of the annuitant (or joint lives of the annuitant and beneficiary);
(5) from a contract that is a qualified funding asset for purposes of a
structured settlement; (6) made under an annuity contract that is purchased with
a single premium and with an annuity payout date not later than a year from the


                                       15
<PAGE>   20


   
purchase of the annuity; (7) incident to divorce, or (8) taken from an IRA for
a qualified first-time home purchase (up to $10,000) or qualified education
expense. If an election is made not to have withholding apply to the early
withdrawal or if an insufficient amount is withheld, the contract owner may be
responsible for payment of estimated tax. You may also incur penalties under
the estimated tax rules if the withholding and estimated tax payments are not
sufficient. Failure to provide your taxpayer identification number will
automatically subject any payments under the contract to withholding.
    

TAX-DEFERRED ANNUITIES
Under the provisions of Section 403(b) of the Code, purchase payments made for
annuity contracts purchased for employees by public educational institutions and
certain tax-exempt organizations which are described in Section 501(c)(3) of the
Code are excludable from the gross income of such employees to the extent that
the aggregate purchase payments plus any other amounts contributed to the
purchase of a contract and toward benefits under qualified retirement plans do
not exceed the exclusion allowance determined for the employee as set forth in
Sections 403(b) and 415 of the Code. Employee contributions are, however,
subject to social security (FICA) tax withholding. All amounts received by an
employee under a contract, either in the form of annuity payments or cash
withdrawal, will be taxed under Section 72 of the Code as ordinary income for
the year received, except for exclusion of any amounts representing "investment
in the contract." Under certain circumstances, amounts received may be used to
make a "tax-free rollover" into one of the types of individual retirement
arrangements permitted under the Code. Amounts received that are eligible for
"tax-free rollover" will be subject to an automatic 20% withholding unless such
amounts are directly rolled over from the tax-deferred annuity to the individual
retirement arrangement.

With respect to earnings accrued and purchase payments made after December 31,
1988, pursuant to a salary reduction agreement under Section 403(b) of the Code,
distributions may be paid only when the employee (a) attains age 59 1/2, (b)
separates from the employer's service, (c) dies, (d) becomes disabled as defined
in the Code, or (e) incurs a financial hardship as defined in the Code. In the
case of hardship, cash distributions may not exceed the amount of such purchase
payments. These restrictions do not affect rights to transfer investments among
the subaccounts and do not limit the availability of transfers between
tax-deferred annuities.


QUALIFIED PENSION OR PROFIT-SHARING PLANS
Under present law, purchase payments made by an employer or trustee, pursuant to
a plan or trust qualified under Section 401(a) or 403(a) of the Code, are
generally excludable from gross income of the employee. The portion, if any, of
the purchase payments made by the employee, or which is considered taxable
income to the employee in the year such payments are made, constitutes an
"investment in the contract" under Section 72 of the Code for the employee's
annuity benefits. Salary reduction payments to a profit sharing plan qualifying
under Section 401(k) of the Code are generally excludable from gross income of
the employee.

   
The Code requires that plans must prohibit any distribution to a plan
participant prior to age 59 1/2, except in the event of death, total disability
or separation from service (special rules apply for plan terminations).
Distributions must commence no later than April 1 of the calendar year
following the year in which the participant reaches age 70 1/2. Premature
distribution of benefits or contributions in excess of those permitted by the
Code may result in certain penalties under the Code.
    

   
If an employee, or one or more of the beneficiaries, receives the total amounts
payable with respect to an employee within one taxable year after age 59 1/2 on
account of the employee's death or separation from service of the employer, any
amount received in excess of the employee's "investment in the contract" may be
taxed under special 5-year forward averaging rules. Five-year averaging will no
longer be available after 1999 except for certain grandfathered individuals.
The taxpayer can elect to have that portion of a lump-sum distribution
attributable to years of participation prior to January 1, 1974 given capital
gains treatment.) The percentage of pre-74 distribution subject to capital
gains treatment decreases as follows: 100%, 1987; 95%, 1988; 75%, 1989; 50%,
1990; and 25%, 1991. For tax years 1992 and thereafter no capital gains
treatment is available (except that taxpayers who were age 50 before 1986 may
still elect capital gains treatment). The employee receiving such a
distribution may be able to make a "tax-free rollover" of the distribution less
the employee's "investment in the contract" into another qualified plan in
which the employee is a participant or into one of the types of individual
retirement arrangements permitted under the Code. An employee's surviving
spouse receiving such a distribution may be able to make a tax-free rollover to
one of the types of individual retirement arrangements permitted under the
Code. Amounts received that are eligible for "tax-free rollover" will be
subject to an automatic 20% withholding unless such amounts are directly rolled
over to another qualified plan or individual retirement arrangement.
    




                                       16
<PAGE>   21


INDIVIDUAL RETIREMENT ANNUITIES (IRA) 

   
Section 408(b) of the Code provides that an individual may invest an amount up
to $2,000 per year of earned income in an IRA and claim it as a personal tax
deduction if such person is not an "active participant" in an employer
maintained qualified retirement plan or such person has adjusted gross income
which does not exceed the "applicable dollar limit." For a single taxpayer, the
applicable dollar limitation is $30,000, with the amount of IRA contribution
which may be deducted reduced proportionately for Adjusted Gross Income between
$30,000-$40,000. For married couples filing jointly, the applicable dollar
limitation is $50,000, with the amount of IRA contribution which may be
deducted reduced proportionately for Adjusted Gross Income between
$50,000-$60,000. There is no deduction allowed for IRA contributions when
Adjusted Gross Income reaches $40,000 for individuals and $60,000 for married
couples filing jointly. In the alternative, an individual otherwise qualified
for an IRA may elect to contribute to an IRA for the individual and for the
individual's non-working spouse, with the total deduction limited to $4,000.
    

Individuals are permitted to make non-deductible IRA contributions to the extent
they are ineligible to make deductible IRA contributions. Any amount received
from another qualified plan (including another individual retirement
arrangement) which is eligible as a "tax-free rollover" may be invested in an
IRA, and is not counted toward the overall contribution limit. Earnings on
nondeductible IRA contributions are not subject to tax until they are withdrawn.
The combined limit on designated nondeductible and deductible contributions for
a tax year is the lesser of 100% of compensation or $2,000 ($4,000 in the case
of an additional contribution to a spousal IRA).

Generally, distributions (all or part) made prior to age 59 1/2 (except in the
case of death or disability) will result in a penalty tax of 10% plus ordinary
income tax treatment of the amount received. Additionally, there is an excise
tax of 6% of the amount contributed in excess of either the deductible limit or
nondeductible limit, as indicated above, if such amount is not withdrawn prior
to the filing of the income tax return for the year of contribution or applied
as an allowable contribution for a subsequent year. The excise tax will continue
to apply each year until the excess contribution is corrected. Distributions
after age 59 1/2 are treated as ordinary income at the time received.
Distributions must commence before April 1 following the year in which the
individual reaches age 70 1/2. A 50% nondeductible excise tax is imposed on the
excess in any tax year of the amount that should have been distributed over the
amount actually distributed.

   
Section 408A of the Code provides for a special type of IRA called a Roth IRA.
No tax deduction is allowed for contributions to a Roth IRA, but assets grow on
a tax deferred basis. Under certain circumstances, withdrawals from a Roth IRA
can be excludable from income. Eligibility for a Roth IRA is based on adjusted
gross income and filing status. Special rules apply which allow traditional
IRAs to be rolled over or converted to a Roth IRA.
    

SIMPLIFIED EMPLOYEE PENSION PLANS (SEPPS)
Under Section 408 of the Code, employers may establish SEPPs for their
employees. Under these plans the employer may contribute on behalf of an
employee to an individual retirement account or annuity. The amount of the
contribution is excludable from the employee's income.

   
Certain employees who participate in a SEPP will be entitled to elect to have
the employer make contributions to a SEPP on their behalf or to receive the
contributions in cash. If the employee elects to have contributions made on the
employee's behalf to a SEPP, it is not treated as current taxable income to the
employee. Elective deferrals under a SEPP are subject to an inflation-indexed
limit which is $10,000 for 1998. Salary-reduction SEPPs are available only if at
least 50% of the employees elect to have amounts contributed to the SEPP and if
the employer has 25 or fewer employees at all times during the preceding year.
New salary-reduction SEPPs may not be established after 1996.
    

An employee may also take a deduction for individual contributions to the IRA,
subject to the limits applicable to IRAs in general. Withdrawals from the IRAs
to which the employer contributes must be permitted. These withdrawals, however,
are subject to the general rules with respect to withdrawals from IRAs.


WITHHOLDING ON DISTRIBUTION
Distributions from tax-deferred annuities or qualified pension or profit sharing
plans that are eligible for "tax-free rollover" will be subject to an automatic
20% withholding unless such amounts are directly rolled over to an individual
retirement arrangement or another qualified plan. Federal income tax withholding
on annuity payments is required. However, recipients of annuity payments are
allowed to elect not to have the tax withheld. Such an election may be revoked
at any time with respect to annuity payments and thereafter withholding would
commence. Failure to provide your taxpayer identification number will
automatically subject any payments under the contract to withholding.


                                       17
<PAGE>   22


                                   APPENDIX A
                            IRA DISCLOSURE STATEMENT

   
This statement is designed to help you understand the requirements of federal
tax law which apply to your individual retirement annuity (IRA), your
simplified employee pension IRA (SEPP-IRA) for employer contributions, your
Savings Incentive Match Plan for Employees (SIMPLE) IRA, or to one you purchase
for your spouse (see "IRA for Non-working Spouse", page 19). You can obtain
more information regarding your IRA either from your sales representative or
from any district office of the Internal Revenue Service.
    


   
FREE LOOK PERIOD
The annuity contract offered by this prospectus gives you the opportunity to
return the contract for a full refund within 20 days after it is delivered (see
page 8). This is a more liberal provision than is required in connection with
IRA's. To exercise this "free-look" provision write or call the address shown
below:
The Ohio National Life Insurance Company
Variable Annuity Administration
P. O. Box 2669
Cincinnati, Ohio 45201
Telephone: 1-800-366-6654 - 8:30 a.m. - 4:30 p.m. (Eastern Time Zone)
    

ELIGIBILITY REQUIREMENTS
IRAs are intended for all persons with earned compensation whether or not they
are covered under other retirement programs. Additionally if you have a
non-working spouse (and you file a joint tax return), you may establish an IRA
on behalf of your non-working spouse. A working spouse may establish his or her
own IRA. A divorced spouse receiving taxable alimony (and no other income) may
also establish an IRA.


   
CONTRIBUTIONS AND DEDUCTIONS
Contributions to your IRA will be deductible if you are not an
"active participant" in an employer maintained qualified retirement plan or you
have Adjusted Gross Income which does not exceed the "applicable dollar limit".
IRA (or SEPP-IRA) contributions must be made by no later than the time you file
your income tax return for that year. For a single taxpayer, the applicable
dollar limitation is $30,000, with the amount of IRA contribution which may be
deducted reduced proportionately for Adjusted Gross Income between
$30,000-$40,000. For married couples filing jointly, the applicable dollar
limitation is $50,000, with the amount of IRA contribution which may be deducted
reduced proportionately for Adjusted Gross Income between $50,000-$60,000. There
is no deduction allowed for IRA contributions when Adjusted Gross Income reaches
$40,000 for individuals and $60,000 for married couples filing jointly.
    

   
Contributions made by your employer to your SEPP-IRA are excludable from your
gross income for tax purposes in the calendar year for which the amount is
contributed. Certain employees who participate in a SEPP-IRA will be entitled to
elect to have their employer make contributions to their SEPP-IRA on their
behalf or to receive the contributions in cash. If the employee elects to have
contributions made on the employee's behalf to the SEPP, those funds are not
treated as current taxable income to the employee. Elective deferrals under a
SEPP-IRA are subject to an inflation-adjusted limit which is $9,500 for 1997.
Salary-reduction SEPP-IRAs (also called "SARSEPs") are available only if at
least 50% of the employees elect to have amounts contributed to the SEPP-IRA and
if the employer has 25 or fewer employees at all times during the preceding
year. New salary-reduction SEPPs may not be established after 1996.
    

The IRA maximum annual contribution and your tax deduction is limited to the
lesser of: (1) $2,000 or (2) 100% of your earned compensation. Contributions in
excess of the deduction limits may be subject to penalty. See below.

   
Under a SEPP-IRA agreement, the maximum annual contribution which your employer
may make on your behalf to a SEPP-IRA contract which is excludable from your
income is the lesser of 15% of your salary or $24,000. An employee who is a
participant in a SEPP-IRA agreement may make after-tax contributions to the
SEPP-IRA contract, subject to the contribution limits applicable to IRAs in
general. Those employee contributions will be deductible subject to the
deductibility rules described above.
    


                                       18
<PAGE>   23


The maximum tax deductible annual contribution that a divorced spouse with no
other income may make to an IRA is the lesser of (1) $2,000 or (2) 100% of
taxable alimony.

If you or your employer should contribute more than the maximum contribution
amount to your IRA or SEPP-IRA, the excess amount will be considered an "excess
contribution". You are permitted to withdraw an excess contribution from your
IRA or SEPP-IRA before your tax filing date without adverse tax consequences.
If, however, you fail to withdraw any such excess contribution before your tax
filing date, a 6% excise tax will be imposed on the excess for the tax year of
contribution.

Once the 6% excise tax has been imposed, an additional 6% penalty for the
following tax year can be avoided if the excess is (1) withdrawn before the end
of the following year, or (2) treated as a current contribution for the
following year. (See Premature Distributions, page 19, for penalties imposed on
withdrawal when the contribution exceeds $2,000).

IRA FOR NON-WORKING SPOUSE
If you establish an IRA for yourself, you will also be eligible to establish an
IRA for your "non-working" spouse. In order to be eligible to establish such a
spousal IRA, you must file a joint tax return with your spouse and if your
non-working spouse has compensation, his/her compensation must be less than
your compensation for the year.  Contributions of up to $2,000 each may be made
to your IRA and the spousal IRA if the combined compensation of you and your
spouse is at least equal to the amount contributed.  If requirements for
deductibility (including income levels) are met, you will be able to deduct an
amount equal to the least of (i) the amount contributed to the IRAs, (ii)
$4,000, or (iii) 100% of your combined gross income.

Contributions in excess of the contribution limits may be subject to a penalty.
See above under "Contributions and Deductions".  If you contribute more than the
allowable amount, the excess portion will be considered an excess contribution.
The rules for correcting it are the same as discussed above for regular IRAs.


Other than the items mentioned in this section, all of the requirements
generally applicable to IRAs are also applicable to IRAs established for
non-working spouses.

ROLLOVER CONTRIBUTION
Once every year, you are permitted to withdraw any portion of the value of your
IRA or SEPP-IRA and reinvest it in another IRA or bond. Withdrawals may also be
made from other IRAs and contributed to this contract. This transfer of funds
from one IRA to another is called a "rollover" IRA. To qualify as a rollover
contribution, the entire portion of the withdrawal must be reinvested in another
IRA within 60 days after the date it is received. You will not be allowed a
tax-deduction for the amount of any rollover contribution.

A similar type of rollover to an IRA can be made with the proceeds of a
qualified distribution from a qualified retirement plan or tax-sheltered
annuity. Properly made, such a distribution will not be taxable until you
receive payments from the IRA created with it. Unless you were a self-employed
participant in the distributing plan, you may later roll over such a
contribution to another qualified retirement plan as long as you have not mixed
it with IRA (or SEPP-IRA) contributions you have deducted from your income. (You
may roll less than all of a qualified distribution into an IRA, but any part of
it not rolled over will be currently includable in your income without any
capital gains treatment.)


PREMATURE DISTRIBUTIONS
At no time can your interest in your IRA or SEPP-IRA be forfeited. To insure
that your contributions will be used for your retirement, the federal tax law
does not permit you to use your IRA or SEPP-IRA as security for a loan.
Furthermore, as a general rule, you may not sell or assign your interest in your
IRA or SEPP-IRA to anyone. Use of an IRA (or SEPP-IRA) as security or assignment
of it to another will invalidate the entire annuity. It then will be includable
in your income in the year it is invalidated and will be subject to a 10%
penalty tax if you are not at least age 59 1/2 or totally disabled. (You may,
however, assign your IRA or SEPP-IRA without penalty to your former spouse in
accordance with the terms of a divorce decree.)


                                       19
<PAGE>   24


You may surrender any portion of the value of your IRA (or SEPP-IRA). In the
case of a partial surrender which does not qualify as a rollover, the amount
withdrawn will be includable in your income and subject to the 10% penalty if
you are not at least age or 59 1/2 totally disabled unless you comply with
special rules requiring distributions to be made at least annually over your
life expectancy. 

The 10% penalty tax does not apply to the withdrawal of an excess contribution  
as long as the excess is withdrawn before the due date of your tax return.
Withdrawals of excess contributions after the due date of your tax return will
generally be subject to the 10% penalty unless the excess contribution results
from erroneous information from a plan trustee making an excess rollover
contribution or unless you are over age 59 1/2 or are disabled.


DISTRIBUTION AT RETIREMENT
Once you have attained age 59 1/2 (or have become totally disabled), you may
elect to receive a distribution of your IRA (or SEPP-IRA) regardless of when you
actually retire. You may elect to receive the distribution in either one sum or
under any one of the periodic payment options available under the contract. The
distributions from your IRA under any one of the periodic payment options or in
one sum will be treated as ordinary income as you receive them.


   
INADEQUATE DISTRIBUTIONS - 50% TAX
Your IRA or SEPP-IRA is intended to provide retirement benefits over your
lifetime. Thus, federal law requires that you either (1) receive a lump-sum
distribution of your IRA by April 1 of the year following the year in which you
attain age 70 1/2 or (2) start to receive periodic payments by that date. If you
elect to receive periodic payments, those payments must be sufficient to pay out
the entire value of your IRA during your life expectancy (or over the joint life
expectancies of you and your spouse). If the payments are not sufficient to meet
these requirements, an excise tax of 50% will be imposed on the amount of any
underpayment.
    


   
DEATH BENEFITS
If you, (or your surviving spouse) die before receiving the entire value of your
IRA (or SEPP-IRA), the remaining interest must be distributed to your
beneficiary (or your surviving spouse's beneficiary) in one lump-sum within 5
years of death, or applied to purchase an immediate annuity for the 
beneficiary. This annuity must be payable over the life expectancy of the 
beneficiary beginning within one year after your or your spouse's death. If
your spouse is the designated beneficiary, he or she is treated as the owner of
the IRA. If minimum required distributions have begun, the entire amount must
be distributed at least as rapidly as if the owner had survived. A distribution
of the balance of your IRA upon your death will not be considered a gift for
federal tax purposes, but will be included in your gross estate for purposes of
federal estate taxes.
    

   
ROTH IRAS

Section 408A of the Code now permits eligible individuals to contribute to a
type of IRA known as a "Roth IRA." Contributions may be made to a Roth IRA by
taxpayers with adjusted gross incomes of less than $160,000 for married
individuals filing jointly and less than $100,000 for single individuals.
Married individuals filing separately are not eligible to contribute to a Roth
IRA. The maximum amount of contributions allowable for any taxable year to all
Roth IRAs maintained by an individual is generally the lesser of $2,000 and 100%
of compensation for that year (the $2,000 limit is phased out for incomes
between $150,000 and $160,000 for married and between $95,000 and $110,000 for
singles). The contribution limit is reduced by the amount of any contributions
made to a non-Roth IRA. Contributions to a Roth IRA are not deductible.

For taxpayers with adjusted gross income of $100,000 or less, all or part of
amounts in a non-Roth IRA may be converted, transferred or rolled over to a Roth
IRA. Some or all of the IRA value will typically be includable in the taxpayer's
gross income. If such a rollover, transfer or conversion occurs before 1/1/99,
the portion of the amount includable in gross income must be included in income
ratably over the next four years beginning with the year in which the
transaction occurred. Provided a rollover contribution meets the requirements
for IRAs under Section 408(d)(3) of the Code, a rollover may be made from a Roth
IRA to another Roth IRA.

UNDER SOME CIRCUMSTANCES, IT MAY NOT BE ADVISABLE TO ROLL OVER, TRANSFER OR
CONVERT ALL OR PART OF A NON-ROTH IRA TO A ROTH IRA. PERSONS CONSIDERING A
ROLLOVER, TRANSFER OR CONVERSION SHOULD CONSULT THEIR OWN TAX ADVISOR.

"Qualified distributions" from a Roth IRA are excludable from gross income. A
"qualified distribution" is a distribution that satisfies two requirements: (1)
the distribution must be made (a) after the owner of the IRA attains age 59 1/2;
(b) after the owner's death; (c) due to the owner's disability; or (d) for a
qualified first time homebuyer distribution within the meaning of Section
72(t)(2)(F) of the Code; and (2) the distribution must be made in the year that
is at least five years after the first year for which a contribution was made to
any Roth IRA established for the owner or five years after a rollover, transfer
or conversion was made from a non-Roth IRA to a Roth IRA. Distributions from a
Roth IRA that are not qualified distributions will be treated as made first from
contributions and then from earnings, and taxed generally in the same manner as
distributions from a non-Roth IRA.

Distributions from a Roth IRA need not commence at age 70 1/2. However, if the
owner dies before the entire interest in a Roth IRA is distributed, any
remaining interest in the contract must be distributed by December 31 of the
calendar year containing the fifth anniversary of the owner's death subject to
certain exceptions.
    

PROTOTYPE STATUS
The Internal Revenue Service has been requested to review the format of your
SEPP, and to issue an opinion letter to Ohio National Life stating that your IRA
qualifies as a prototype SEPP.

REPORTING TO THE IRS
Whenever you are liable for one of the penalty taxes discussed above (6% for
excess contributions, 10% for pre-mature distributions or 50% for
underpayments), you must file Form 5329 with the Internal Revenue Service. The
form is to be attached to your federal income tax return for the tax year in
which the penalty applies. Normal contributions and distributions must be shown
on your income tax return for the year to which they relate.




                                       20
<PAGE>   25


                     ILLUSTRATION OF IRA FIXED ACCUMULATIONS

<TABLE>
<CAPTION>
                                 AGE 60                             AGE 65                             AGE 70
                               GUARANTEED                         GUARANTEED                         GUARANTEED
                             SURRENDER VALUE                    SURRENDER VALUE                    SURRENDER VALUE
                             ---------------                    ---------------                    ---------------
                                         $2,000                              $2,000                             $2,000
                        $1,000          ONE TIME          $1,000            ONE TIME           $1,000           ONE TIME
   CONTRACT             ANNUAL          LUMP SUM          ANNUAL            LUMP SUM           ANNUAL           LUMP SUM
 ANNIVERSARY         CONTRIBUTIONS    CONTRIBUTION     CONTRIBUTIONS      CONTRIBUTION     CONTRIBUTIONS      CONTRIBUTION
 -----------         -------------    ------------     -------------      ------------     -------------      ------------
     <S>             <C>               <C>              <C>               <C>               <C>              <C>        
      1              $    925.35       $  2,027.45      $    925.35       $  2,027.45       $    925.35      $  2,027.45
      2                 1,878.46          2,055.72         1,878.46          2,055.72          1,878.46         2,055.72
      3                 2,870.01          2,083.76         2,870.01          2,083.76          2,870.01         2,083.76
      4                 3,901.83          2,111.91         3,901.83          2,111.91          3,901.83         2,111.91
      5                 4,975.45          2,140.16         4,975.45          2,104.16          4,975.45         2,140.16
      6                 6,102.14          2,166.24         6,102.14          2,166.24          6,102.14         2,166.24
      7                 7,276.08          2,194.24         7,276.08          2,194.24          7,276.08         2,194.24
      8                 8,497.12          2,222.31         8,497.12          2,222.31          8,497.12         2,222.31
      9                 9,757.56          2,253.98         9,757.56          2,253.98          9,757.56         2,253.98
     10                11,055.81          2,286.60        11,055.81          2,286.60         11,055.81         2,286.60
     15                18,155.17          2,464.97        18,155.17          2,464.97         18,155.17         2,464.97
     20                26,385.27          2,671.76        26,385.27          2,671.76         26,385.27         2,671.76
     25                35,926.22          2,911.48        35,926.22          2,911.48         35,926.22         2,911.48
     30                46,986.79          3,189.39        46,986.79          3,189.39         46,986.79         3,189.39
     35                59,809.02          3,511.55        59,809.02          3,511.55         59,809.02         3,511.55
     40                74,673.50          3,885.03        74,673.50          3,885.03         74,673.50         3,885.03
     45                91,905.51          4,318.00        91,905.51          4,318.00         91,905.51         4,318.00
     50               111,882.13          4,819.92       111,882.13          4,819.92        111,882.13         4,819.92
     55               135,040.51          5,401.79       135,040.51          5,401.79        135,040.51         5,401.79
     60               161,887.42          6,076.34       161,887.42          6,076.34        161,887.42         6,076.34
     65                                                  193,010.34          6,858.32        193,010.34         6,858.32
     70                                                                                      229,090.34         7,764.85

<FN>
*  Guaranteed Interest Rate: 3.00% is applicable to each contract anniversary.
*  The Surrender Value is the Accumulation Values less the Contingent Deferred
   Sales Charge.
</TABLE>





                                      21
<PAGE>   26



                                     PART B



                      STATEMENT OF ADDITIONAL INFORMATION
                                        
<PAGE>   27
                        OHIO NATIONAL VARIABLE ACCOUNT A
                                       OF
                    THE OHIO NATIONAL LIFE INSURANCE COMPANY

                                One Financial Way
                             Cincinnati, Ohio 45242
                            Telephone (513) 794-6452


                       STATEMENT OF ADDITIONAL INFORMATION

   
                                  May 1, 1998
    

   
This Statement of Additional Information is not a prospectus. It should be read
in conjunction with the prospectus for Ohio National Variable Account A ("VAA")
flexible purchase payment individual variable annuity contracts dated May 1,
1998. To obtain a free copy of the VAA prospectus, write or call The Ohio
National Life Insurance Company ("Ohio National Life") at the above address.
    

   
<TABLE>
<CAPTION>
                                Table of Contents


<S>                                                                    <C>
     Custodian . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
     Independent Certified Public Accountants. . . . . . . . . . . . .  2
     Underwriter . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
     Calculation of Money Market Subaccount Yield  . . . . . . . . . .  3
     Total Return  . . . . . . . . . . . . . . . . . . . . . . . . . .  3
     Transfer Limitations  . . . . . . . . . . . . . . . . . . . . . .  4
     The Year 2000 Issue . . . . . . . . . . . . . . . . . . . . . . .  4
     Appendix:
              Loans Under Tax-sheltered Annuities  . . . . . . . . . .  5
              Guaranteed Account . . . . . . . . . . . . . . . . . . .  5
     Financial Statements  . . . . . . . . . . . . . . . . . . . . . .  7
</TABLE>
    

                           "INVESTAR VISION/SPECTRUM"
                                VARIABLE ANNUITY
<PAGE>   28
CUSTODIAN

Ohio National Life has executed an agreement with Star Bank, N.A  ("the Bank"),
Cincinnati, Ohio, pursuant to which the shares of Ohio National Fund, Inc.
("Fund") and other assets credited to VAA in connection with these contracts
will be held in the custody of the Bank. The agreement provides that the Bank
will purchase Fund shares at their net asset value determined as of the end of
the valuation period of VAA during which the purchase payment is received by
Ohio National Life for outstanding contracts or, in the case of new contracts,
the value determined as of the end of the valuation period during which the
contract is issued. The Bank effects redemptions of Fund shares held by VAA
upon instructions from Ohio National Life at net asset value determined as of
the end of the valuation period of VAA during which a redemption request is
received or made by Ohio National Life. In addition, the Bank maintains
appropriate records with respect to all transactions in Fund shares relative to
VAA.

The agreement requires the Bank to have at all times an aggregate capital,
surplus and undivided profit of not less than $2 million and prohibits
resignation by the Bank until (a) a successor custodian bank having the
qualifications enumerated above shall have agreed to serve as custodian, or (b)
VAA has been completely liquidated and the proceeds of such liquidation properly
distributed. Subject to these conditions the agreement of custodianship may be
terminated by either party upon sixty days written notice. For its services as
custodian, the Bank will be paid a fee to be agreed upon from time to time by
the Bank and Ohio National Life.

INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS

   
The financial statements of VAA as of December 31, 1997 and for the periods
indicated herein and Ohio National Life's consolidated financial statements
as of December 31, 1997 and 1996 and for the periods indicated herein have been
included herein in reliance upon the reports of KPMG Peat Marwick LLP,
independent certified public accountants, appearing elsewhere herein, and upon
the authority of said firm as experts in accounting and auditing.
    

UNDERWRITER

The offering of the contracts is continuous. Prior to May 1, 1997, the O.N.
Equity Sales Company ("ONESCO"), a wholly-owned subsidiary of Ohio National
Life, was the principal underwriter of the contracts. The aggregate amount of
underwriting commissions paid to ONESCO with respect to contracts issued by VAA,
and the amounts retained by ONESCO, for each of the last three years have been:

   
<TABLE>
<CAPTION>
                            Aggregate                  Retained
          Year             Commissions                Commissions
          ----             -----------                -----------
<S>                         <C>                         <C>     
          1997              $                           $
          1996               2,461,096                   239,957
          1995               1,645,426                   151,215
</TABLE>
    

Since May 1, 1997, Ohio National Equities, Inc., another wholly-owned subsidiary
of Ohio National Life, has been the principal underwriter of the contracts. Its
aggregate and retained commissions have been:


                            Aggregate                  Retained
          Year             Commissions                Commissions
          ----             -----------                -----------
          1997              $                           $


                                       -2-
<PAGE>   29
CALCULATION OF MONEY MARKET SUBACCOUNT YIELD

   
The current yield of the Money Market subaccount for the seven days ended on
December 31, 1997, was 4.09%. This was calculated by determining the net change,
exclusive of capital changes, in the value of a hypothetical pre-existing
account having a balance of one accumulation unit of the subaccount at the
beginning of the seven-day period, dividing the net change in subaccount value
by the value of the subaccount at the beginning of the base period to obtain the
base period return, and multiplying the difference by 365/7. The resulting
figure is carried to the nearest hundredth of one percent.
    


TOTAL RETURN

The average annual compounded rate of return for a contract with respect to a
particular subaccount over a given period is found by equating the initial
amount invested to the ending redeemable value using the following formula:

                                 P(1 + T)n = ERV

         where:      P = a hypothetical initial payment of $1,000,
                     T = the average annual total return,
                     n = the number of years, and
                   ERV = the ending redeemable value of a hypothetical
                         $1,000 beginning-of-period payment at the end
                         of the period (or fractional portion thereof).

For this purpose, it should be noted that the current series of contracts were
initially offered on January 3, 1997. The data based upon the performance of the
subaccounts prior to that date is presented as if the same charges and
deductions applicable to the current contracts had been in effect from the
inception of each corresponding portfolio of the Fund. Note also that, for
purposes of these calculations, the annual contract administration charge of $35
has been converted to an annualized percentage charge of 0.12%. This is based
upon an estimated average accumulation value of $29,000 for contracts in this
series. The actual effect that the contract administration charge would have on
total returns would be less than that percentage for contracts having a higher
accumulation value and greater than that percentage for contracts having a lower
accumulation value.

   
The average annual total returns for current contracts in each of the
subaccounts from the inception of the subaccount and for the one-, five- and
ten-year periods ending on December 31, 1997, and assuming surrender of the
contract on the latter date, are as follows:
    

   
<TABLE>
<CAPTION>
                     One            Five           Ten           From           Inception
                     Year           Years         Years        Inception         Date  
                     ----           -----         -----        ---------         ----  
<S>                  <C>            <C>          <C>              <C>          <C>
Equity               16.53%         13.67%       12.04%           9.54%        10-06-69
Money Market          3.92%          3.13%        4.08%           5.82%        03-20-80
Bond                  7.77%          6.00%        6.81%           7.20%        11-02-82
Omni                 16.52%         11.90%       11.01%          10.50%        09-10-84
</TABLE>
    

                                       -3-
<PAGE>   30
   
<TABLE>
<CAPTION>
                           One            Five           Ten           From           Inception
                           Year           Years         Years        Inception          Date  
                           ----           -----         -----        ---------          ----  
<S>                        <C>              <C>          <C>           <C>            <C>
International               0.70%           N/A          N/A           11.47%         04-30-93
Capital Appreciation       13.60%           N/A          N/A           14.13%         05-01-94
Small Cap                   6.97%           N/A          N/A           20.08%         05-01-94
Global Contrarian          10.12%           N/A          N/A           10.38%         03-31-95
Aggressive Growth          10.97%           N/A          N/A           13.00%         03-31-95
Strategic Income             N/A            N/A          N/A            7.24%         01-03-97
Stellar                      N/A            N/A          N/A            8.18%         01-03-97
Relative Value               N/A            N/A          N/A           26.51%         01-03-97
Emerging Markets                %           N/A          N/A                %         02-02-96

</TABLE>
    


TRANSFER LIMITATIONS

To the extent that transfers, surrenders, partial withdrawals and annuity
payments from a subaccount exceed net purchase payments and transfers into that
subaccount, securities of the corresponding portfolio of the Fund may have to be
sold. Excessive sales of a portfolio's securities on short notice could be
detrimental to that portfolio and to contractowners with values allocated to the
corresponding subaccount. To protect the interests of all contractowners, Ohio
National Life reserves the right to limit the number, frequency, method or
amount of transfers. Transfers from any portfolio of the Fund on any one day may
be limited to 1% of the previous day's total net assets of that portfolio if
Ohio National Life or the Fund, in its or their discretion, believes that the
portfolio might otherwise be damaged.

If and when transfers must be so limited, some transfer requests will not be
made. In determining which requests will be made, scheduled transfers (that is,
those pursuant to a pre-existing dollar cost averaging program) will be made
first, followed by mailed written requests in the order postmarked and, lastly,
telephone and facsimile requests in the order received. Contractowners whose
transfer requests are not made will be so notified. Current SEC rules preclude
Ohio National Life from processing at a later date those requests that were not
made. Accordingly, a new transfer request would have to be submitted in order to
make a transfer that was not made because of these limitations.

   
The Year 2000 Issue

Ohio National Life has considered the impact on its business of "Year 2000"
issues. It has developed a remedial plan for its computer systems and
applications. Conversion activities are presently in process and Ohio National
Life expects conversion testing and implementation to be completed by December
31, 1998. While Ohio National Life has been assured by suppliers of financial
services (including underlying mutual funds, custodians, transfer agents and
accounting agents) that their systems either are already compliant or will be so
by December 31, 1998, Ohio National Life's internal auditors and independent
public accountants intend to independently test those systems (other than
systems of unaffiliated mutual funds and their suppliers) to verify their
compliance. The failure of Ohio National Life or one of its suppliers to achieve
timely and complete compliance could materially impair Ohio National Life's
ability to conduct its business, including its ability to accurately and timely
value interests in the contracts.
    


                                       -4-

<PAGE>   31

                                    APPENDIX


LOANS UNDER TAX-SHELTERED ANNUITIES

   
Contracts issued as tax-sheltered annuities pursuant to plans qualifying under
Section 403(b) of the Code, and allowing for voluntary contributions only, are
eligible for loans secured by a security interest in the contract. Any such loan
must be for at least $1,000 and may only be made from guaranteed accumulation
values (see Guaranteed Account, below). The loan amount is limited by the 
maximum loan formula described in the contract.
    

The annual effective rate of interest charged for loans will not exceed 7%.
Loans must generally be repaid within 5 years (or 20 years if the loan is used
for the purchase of the contract owner's principal residence).

The amount of the death benefit, the amount payable on a full surrender and the
amount that will be applied to provide an annuity on the annuity payout date
will be reduced by the amount of outstanding loan balance, including accrued
interest, as of the date of any such transaction.

   
GUARANTEED ACCOUNT
    

   
The Guaranteed Account guarantees a fixed return for a specified period of time
and guarantees the principal against loss. Any portion of a contract relating
to the Guaranteed Account is not registered under the Securities Act of 1933.
The Guaranteed Account is not registered as an investment company under the
1940 Act. Accordingly, neither the Guaranteed Account nor any interests in it
are subject to the provisions or restrictions of either such Act, and the
disclosures in this appendix have not been reviewed by the staff of the
Securities and Exchange Commission.

The Guaranteed Account consists of all of Ohio National Life's general assets 
other than those allocated to a separate account. Purchase payments and 
accumulation values under a contract will be allocated between the Guaranteed 
Account and VAA. The allocation will be as elected by the owner at the time of 
purchase or as subsequently changed.
    

Ohio National Life will invest its general assets in its discretion as allowed
by applicable state law. Investment income from Ohio National Life's general
assets will be allocated to those contracts having guaranteed accumulation
values in accordance with the terms of such contracts.

   
The amount of investment income allocated to the contracts will vary from year
to year in Ohio National Life's sole discretion. However, Ohio National Life
guarantees that it will credit interest at a rate of not less than 3.00% per
year, compounded annually, to contract values allocated to the Guaranteed
Account. Ohio National Life may credit interest at a rate in excess of 3.00%, 
but any such excess interest credit will be in Ohio National Life's sole 
discretion.
    


   
                                      -5-
    

<PAGE>   32
   
Ohio National Life guarantees that the guaranteed accumulation value of a
contract will never be less than (a) the amount of purchase payments allocated
to, and transfers into, the Guaranteed Account, plus (b) interest credited at
the rate of 3.00% per year compounded annually, plus (c) any additional excess
interest Ohio National Life may credit to guaranteed accumulation values, and
less (d) any partial withdrawals, loans and transfers from the guaranteed
accumulation values, and less (e) any contingent deferred sales charges on
partial withdrawals, loan interest, state premium taxes, transfer fees, and the
portion of the $35 annual contract administration charge allocable to the
Guaranteed Account. No deductions are made from the Guaranteed Account for
administrative expenses or risk undertakings. (See "Deductions and Expenses" in
the prospectus.)
    

   
Not more than 20% of the guaranteed accumulation value of a contract (or $1,000,
if greater), as of the beginning of any contract year, may be transferred to one
or more variable subaccounts during that contract year. As provided by
applicable state law, Ohio National Life reserves the right to defer the payment
of amounts withdrawn from the Guaranteed Account for a period not to exceed six
months from the date written request for such withdrawal is received by Ohio 
National Life.
    



VAASAIIV


                                      -6-
<PAGE>   33
                        OHIO NATIONAL VARIABLE ACCOUNT A


                                    FORM N-4


                                     PART C

                                OTHER INFORMATION
<PAGE>   34
ITEM 24.  FINANCIAL STATEMENTS AND EXHIBITS

   
The following financial statements of the Registrant are to be included in Part
B of this Registration Statement and will be furnished by a post-effective
amendment hereto:

      Independent Auditors' Report of KPMG Peat Marwick LLP dated January 30,
      1998

      Statements of Assets and Contract Owners' Equity as of December 31, 1997

      Statement of Operations and Changes in Contract Owners' Equity for the
      Years Ended December 31, 1997 and 1996

      Notes to Financial Statements as of December 31, 1997

      Schedules of Changes in Unit Values for the Years Ended December 31, 1997
      and 1996

The following consolidated financial statements of the Depositor and its
subsidiaries are also to be included in Part B of this Registration Statement
and will be furnished by a post-effective amendment hereto:

      Independent Auditors' Report of KPMG Peat Marwick LLP dated February __,
      1998

      Consolidated Balance Sheets as of December 31, 1997 and 1996

      Consolidated Statements of Income for the Years Ended December 31, 1997,
      1996 and 1995

      Consolidated Statements of Equity for the Years Ended December 31, 1997,
      1996 and 1995

      Consolidated Statements of Cash Flows for the Years Ended December 31,
      1997, 1996 and 1995

      Notes to Consolidated Financial Statements as of December 31, 1997, 1996
      and 1995

Consents of the Following Persons:

      Not applicable
    

Exhibits:

All relevant exhibits, which have previously been filed with the
Commission and are incorporated herein by reference, are as follows:

                                      -1-
<PAGE>   35
(1)      Resolution of Board of Directors of the Depositor authorizing
         establishment of the Registrant was filed as Exhibit A(1) of the
         Registrant's registration statement on Form S-6 on August 3, 1982 (File
         no. 2-78652).
   
    

(3)(a)   Principal Underwriting Agreement for Variable Annuities between the   
         Depositor and Ohio National Equities, Inc. was filed as Exhibit (3)(a)
         of Form N-4, Post-effective Amendment no. 21 of Ohio National Variable
         Account A (File no. 2-91213).

(3)(b)   Registered Representative's Sales Contract with Variable Annuity
         Supplement was filed as Exhibit (3)(b) of the Registrant's Form N-4,
         Post-effective Amendment no. 9 on February 27, 1991 (File no. 2-91213).

(3)(c)   Variable Annuity Sales Commission Schedule was filed as Exhibit A(3)(c)
         of the Registrant's registration statement on Form S-6 on May 18, 1984
         (File no. 2-91213).

(4)      Combination Annuity Contract, Form 96-VA-1, was filed as Exhibit (4)
         of the Registrant's registration statement on August 27, 1996 (File 
         no. 333-10907).

(5)      Variable Annuity Application, Form V-4895-A, was filed as Exhibit (5)
         of the Registrant's registration statement on August 27, 1996 (File 
         no. 333-10907).

(6)(a)   Articles of Incorporation of the Depositor were filed as Exhibit
         A(6)(a) of Ohio National Variable Interest Account registration
         statement on Form N-8B-2 on July 11, 1980 (File no. 811-3060).

(6)(b)   Code of Regulations (by-laws) of the Depositor were filed as Exhibit
         A(6)(b) of Ohio National Variable Interest Account registration
         statement on Form N-8B-2 on July 11, 1980 (File no. 811-3060).

   
(8)      Powers of Attorney by certain Directors of the Depositor were filed as
         Exhibit (8) of the Registrant's Form N-4, Post-effective Amendment no.
         22 (File no. 2-91213).
    

(13)     Computation of Performance Data was filed as Exhibit (13) of Form N-4,
         Post-effective Amendment no. 20, of Ohio National Variable Account A
         (File no. 2-91213) on March 3, 1997.


                                      -2-
<PAGE>   36
   
ITEM 25.  DIRECTORS AND OFFICERS OF THE DEPOSITOR
<TABLE>
<CAPTION>
Name and Principal                 Positions and Offices
Business Address                   with Depositor
- ----------------                   --------------

<S>                                <C>
Neil A. Armstrong                  Director
4635 Drake Road
Cincinnati, Ohio 45243

Trudy K. Backus*                   Vice President, Individual Insurance Services

Thomas A. Barefield*               Senior Vice President, Institutional Sales

Howard C. Becker*                  Senior Vice President, Individual Insurance
                                   and Corporate Services

Ronald L. Benedict*                Corporate Vice President, Cousel and Secretary

Michael A. Boedeker*               Vice President, Fixed Income Securities

Robert E. Bowen*                   Senior Vice President, Information Systems
                     
Roylene M. Broadwell*              Vice President and Treasurer  
               
Joseph P. Brom*                    Senior Vice President & Chief Investment Officer
                
Dale P. Brown                      Director
36 East Seventh Street
Cincinnati, Ohio 45202

Jack E. Brown                      Director
50 E. Rivercenter Blvd.
Covington, Kentucky 41011

William R. Burleigh                Director
One West Fourth Street
Suite 1100
Cincinnati, Ohio 45202

Victoria B. Buyniski               Director
2343 Auburn Avenue   
Cincinnati, Ohio 45219

Raymond R. Clark                   Director
201 East Fourth Street
Cincinnati, Ohio 45202

David W. Cook*                     Senior Vice President and Actuary
               
Dr. Alvin H. Crawford              Director
Children's Hospital Medical Center
Department of Orthopedics
Elland and Bethesda Avenues
Cincinnati, Ohio 45229

Robert M. DiTommaso*               Vice President, Career Marketing

Ronald J. Dolan*                   Senior Vice President and Chief Financial Officer

Michael J. Ferry*                  Vice President, Information Systems 

Michael F. Haverkamp*              Vice President and Counsel

John A. Houser III*                    Vice President, Claims
</TABLE>
    

                                       -3-
<PAGE>   37
   
<TABLE>
<CAPTION>
Name and Principal                  Positions and Offices
Business Address                    with Depositor
- ----------------                    --------------
<S>                                 <C>
Bannus B. Hudson                    Director
One Eastwood Drive
Cincinnati, Ohio 45227

David G. McClure*                   Vice President, Variable Product Sales
                  
Charles S. Mechem, Jr.             
One East Fourth Street
Cincinnati, Ohio 45202

James I. Miller, II*                Vice President, Marketing Support
                    
James W. Nethercott                 Director
8431 Concord Hills Circle
Cincinnati, Ohio 45243

Thomas O. Olson*                    Vice President, Underwriting
                 
David B. O'Maley*                   Director, Chairman, President and Chief Executive Officer
                  
John J. Palmer*                     Senior Vice President, Strategic Initiatives

George B. Pearson, Jr.*             Vice President, PGA Marketing

Dallas L. Pennington*               Vice President, Information Systems

J. Donald Richardson*               Senior Regional Vice President

D. Gates Smith*                     Senior Vice President, Sales

Michael D. Stohler*                 Vice President, Mortgages and Real Estate

Stuart G. Summers*                  Senior Vice President and General Counsel

Oliver W. Waddell                   Director
425 Walnut Street
Cincinnati, Ohio 45202

Bradley L. Warnemunde               Director and Chairman Emeritus
250 William Howard Taft Road
Cincinnati, Ohio 45219

Dr. David S. Williams*              Vice President and Medical Director

Stephen T. Williams*                Vice President, Equity Investments
</TABLE>
    

*The principal business address for these individuals is One Financial Way,
Cincinnati, Ohio 45242.

                                       -4-


<PAGE>   38
   

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
              THE OHIO NATIONAL LIFE INSURANCE COMPANY/CINCINNATI
      A MUTUAL LIFE INSURANCE COMPANY INCORPORATED UNDER THE LAWS OF OHIO
- --------------------------------------------------------------------------------
                                                  
                                                  
                                                  
                                                  
                                                  
<S>                                    <C>
- -------------------------------       -----------------------------
ENTERPRISE PARK, INC.                 OHIO NATIONAL EQUITIES INC.

A GEORGIA CORPORATION                 A BROKER/DEALER
REAL ESTATE DEVELOPMENT COMPANY       CAPITALIZED BY ONLI @ $30,000
CAPITALIZED BY ONLI $50,000

- -------------------------------       --------------------------------
Pres. & Dir.        M. Stohler        Chm. & Dir.         D. O'Maley

V.P. & Dir.         J. Brom           Pres. & Dir.        J. Palmer

Secy. & Dir.        J. Fischer        VP & Dir.           T. Backus

Treas. & Dir.       P. Bergmann       VP & Dir.           J. Miller

                                      Secretary & Dir.    R. Benedict

                                      Treasurer           K. Jaeger

                                      Compliance Officer  J. Dunn

                                      Asst. Secy.         M. Haverkamp
                                                                       
                                                                       

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

<CAPTION>
- -------------------------------------------------------------------------------------------------------------------
                                  THE OHIO NATIONAL LIFE INSURANCE COMPANY/CINCINNATI
                        A MUTUAL LIFE INSURANCE COMPANY INCORPORATED UNDER THE LAWS OF OHIO
- -------------------------------------------------------------------------------------------------------------------
                                                   S E P A R A T E  A C C O U N T S              
                                                   --------------------------------              
                                                          A  B  C  D  E  F                       
                                                   --------------------------------              
                                                                                                
<S>                                <C>                                       <C>                         
- -------------------------------    ------------------------------            -------------------------------------
OHIO NATIONAL INVESTMENTS, INC.    THE O.N. EQUITY SALES COMPANY             OHIO NATIONAL LIFE
                                                                             ASSURANCE CORPORATION
AN INVESTMENT ADVISER              AN OHIO CORPORATION                       AN OHIO CORPORATION
CAPITALIZED BY ONLI @ $10,000      A BROKER/DEALER                           A STOCK LIFE INSURANCE COMPANY
                                   CAPITALIZED BY ONLI @ $790,000            CAPITALIZED BY ONLI @ $32,000,000
                                                                             INCORPORATED UNDER THE LAWS OF OHIO
- -------------------------------    ------------------------------            ------------------------------------
                                   Chm. & Dir.         D. O'Maley            Chm./Pres/.CEO & Dir.  D. O'Maley
Pres. & Dir.        J. Brom                                                  Sr. VP & Dir.          R. Dolan
                                   Pres. & Dir.        J. Palmer             Sr. VP & Dir.          J. Palmer
VP & Dir.           M. Boedeker                                              Sr. VP & Dir.          S. Summers
                                   V.P. & Dir.         M. Haverkamp          Sr. VP & Dir.          J. Brom
VP & Dir.           M. Stohler                                               Sr. Vice Pres.         D. Cook
                                   Secy. & Dir.        R. Benedict           Sr. Vice Pres.         G. Smith
VP & Dir.           S. Williams                                              Vice Pres. & Treas.    R. Broadwell
                                   Director            B. DiTommaso          Vice President         M. Boedeker
Treasurer           D. Taney                                                 Vice President         R. DiTommaso
                                   Treasurer           K. Jaeger             Vice President         T. Backus
Secretary           R. Benedict                                              Vice President         G. Pearson
                                   Compliance Director J. Dunn               Vice President         D. Pennington
VP                  K. Hanson                                                Vice President         M. Stohler
                                                                             Vice Pres.             J. Houser
VP                  D. Hundley                                               Secy.                  R. Benedict
                                                                             Asst. Secy.            J. Fischer
VP                  J. Martin                                                Asst. Actuary          K. Flischel
- -------------------------------    ------------------------------           ------------------------------------
                                                                                       SEPARATE ACCOUNT
                                                                          -------------------------------------
                                                                                              R
                                                                                             ---
<CAPTION>
                                  <= Advisor to  Advisor to =>            
                 --------------------------------------------------------  
<S>                                   <C>                                       <C>
- -----------------------------         --------------------------------          --------------------------------
    ONE FUND, INC.                    O.N. INVESTMENT MANAGEMENT CO.            OHIO NATIONAL FUND
                                                                          
A MARYLAND CORPORATION                AN OHIO CORPORATION                       A MARYLAND CORPORATION
AN OPEN END DIVISIFIED                A FINANCIAL ADVISORY SERVICE              AN OPEN END DIVERSIFIED
MANAGEMENT INVESTMENT COMPANY         CAPITALIZED BY ONESCO @ $145,000          MANAGEMENT INVESTMENT COMPANY
- -----------------------------         --------------------------------          --------------------------------
Pres. & Dir.        J. Palmer         Pres. & Dir.        J. Brom               Pres. & Dir.        J. Palmer
Vice. Pres.         M. Boedeker                                           -----  Vice President      M. Boedeker
Vice  Pres.         J. Brom           VP & Dir.           M. Boedeker            Vice President      J.Brom
Vice Pres.          D. McClure                                                   Vice President      S. Williams
Vice Pres.          S. Williams       VP & Dir.           D. McClure             Treasurer           D. Taney
Treasurer           D. Taney                                            --------  Secy. & Dir.        R. Benedict
Secy. & Dir.        R. Benedict       VP & Dir.           S. Willams              Director            R. Love
Director            R. Love                                                       Director            G. Castrucci
Director            G. Castrucci      Treasurer           D. Taney                Director            G. Vredeveld
Director            G. Vredeveld                                                                                   
                                      Secretary           R. Benedict
                                
                                      Asst. Secy.         B. Hopewell
- ---------------------------------     --------------------------------            ---------------------------------
</TABLE>

    
<PAGE>   39

ITEM 26.  PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH THE DEPOSITOR OR 
          REGISTRANT

The Organization Chart showing the relationships among the Depositor, the
Registrant and their affiliated entities is on page 4A hereof.

ITEM 27.  NUMBER OF CONTRACTOWNERS

   
As of February 16, 1998, the Registrant's contracts were owned by 20,109 owners.
    

ITEM 28.  INDEMNIFICATION

The sixth article of the Depositor's Articles of Incorporation, as amended,
provides as follows:

      Each former, present and future Director, Officer or Employee of the
      Corporation (and his heirs, executors or administrators), or any such
      person (and his heirs, executors or administrators) who serves at the
      Corporation's request as a director, officer, partner, member or employee
      of another corporation, partnership or business organization or
      association of any type whatsoever shall be indemnified by the Corporation
      against reasonable expenses, including attorneys' fees, judgments, fine
      and amounts paid in settlement actually and reasonably incurred by him in
      connection with the defense of any contemplated, pending or threatened
      action, suit or proceeding, civil, criminal, administrative or
      investigative, other than an action by or in the right of the corporation,
      to which he is or may be made a party by reason of being or having been
      such Director, Officer, or Employee of the Corporation or having served at
      the Corporation's request as such director, officer, partner, member or
      employee of any other business organization or association, or in
      connection with any appeal therein, provided a determination is made by
      majority vote of a disinterested quorum of the Board of Directors (a) that
      such a person acted in good faith and in a manner he reasonably believed
      to be in or not opposed to the best interests of the Corporation, and (b)
      that, in any matter the subject of criminal action, suit or proceeding,
      such person had no reasonable cause to believe his conduct was unlawful.
      The termination of any action, suit or proceeding by judgment, order,
      settlement, conviction, or upon a plea of nolo contendere or its
      equivalent, shall not, of itself create a presumption that the person did
      not act in good faith in any manner which he reasonably believed to be in
      or not opposed to the best interests of the Corporation, and with respect
      to any criminal action or proceeding, he had reasonable cause to believe
      that his conduct was unlawful. Such right of indemnification shall not be
      deemed exclusive of any other rights to which such person may be entitled.
      The manner by which the right to indemnification shall be determined in
      the absence of a disinterested quorum of the Board of Directors shall be
      set forth in the Code of Regulations or in such other manner as permitted
      by law. Each former, present, and future Director, Officer or Employee of
      the Corporation (and his heirs, executors or administrators) who serves at
      the Corporation's request as a director, officer, partner, member or
      employee of another corporation, partnership or business organization or
      association of any type whatsoever shall be indemnified by the Corporation
      against reasonable expenses, including attorneys' fees, actually and
      reasonably incurred by him in connection with the defense or settlement of
      any contemplated, pending or threatened action, suit or proceeding, by or
      in the right of the Corporation to procure a judgment in its favor, to
      which he is or may be a party by reason of being or having been such
      Director, Officer or Employee of the Corporation or having served at the
      Corporation's request as such director, officer, partner, member or
      employee of any other business organization or association, or in
      connection with any appeal therein, provided a determination is made by
      majority vote of a disinterested quorum of the Board of Directors (a) that
      such person was not, and has not been adjudicated to have been negligent
      or guilty of misconduct in the performance of his duty to the Corporation
      or to such other business organization or association, and (b) that such
      person acted in good faith and in a manner he reasonably believed to be in
      or not opposed to the best interests of the Corporation.

                                       -5-
<PAGE>   40
      Such right of indemnification shall not be deemed exclusive of any other
      rights to which such person may be entitled. The manner by which the right
      of indemnification shall be determined in the absence of a disinterested
      quorum of the Board of Directors shall be as set forth in the Code of
      Regulations or in such other manner as permitted by law.

In addition, Article XII of the Depositor's Code of Regulations states as
follows:

      If any director, officer or employee of the Corporation may be entitled to
      indemnification by reason of Article Sixth of the Amended Articles of
      Corporation, indemnification shall be made upon either (a) a determination
      in writing of the majority of disinterested directors present, at a
      meeting of the Board at which all disinterested directors present
      constitute a quorum, that the director, officer or employee in question
      was acting in good faith and in a manner he reasonably believed to be in
      or not opposed to the best interests of this Corporation or of such other
      business organization or association in which he served at the
      Corporation's request, and that, in any matter which is the subject of a
      criminal action, suit or proceeding, he had no reasonable cause to believe
      that his conduct was unlawful and in an action by or in the right of the
      Corporation to procure a judgment in its favor that such person was not
      and has not been adjudicated to have been negligent or guilty of
      misconduct in the performance of his duty to the Corporation or to such
      other business organization or association; or (b) if the number of all
      disinterested directors would not be sufficient at any time to constitute
      a quorum, or if the number of disinterested directors present at two
      consecutive meetings of the Board has not been sufficient to constitute a
      quorum, a determination to the same effect as set forth in the foregoing
      clause (a) shall be made in a written opinion by independent legal counsel
      other than an attorney, or a firm having association with it an attorney,
      who has been retained by or who has performed services for this
      Corporation, or any person to be indemnified within the past five years,
      or by the majority vote of the policyholders, or by the Court of Common
      Pleas or the court in which such action, suit or proceeding was brought.
      Prior to making any such determination, the Board of Directors shall first
      have received the written opinion of General Counsel that a number of
      directors sufficient to constitute a quorum, as named therein, are
      disinterested directors. Any director who is a party to or threatened with
      the action, suit or proceeding in question, or any related action, suit or
      proceeding, or has had or has an interest therein adverse to that of the
      Corporation, or who for any other reason has been or would be affected
      thereby, shall not be deemed a disinterested director and shall not be
      qualified to vote on the question of indemnification. Anything in this
      Article to the contrary notwithstanding, if a judicial or administrative
      body determines as part of the settlement of any action, suit or
      proceeding that the Corporation should indemnify a director, officer or
      employee for the amount of the settlement, the Corporation shall so
      indemnify such person in accordance with such determination. Expenses
      incurred with respect to any action, suit or proceeding which may qualify
      for indemnification may be advanced by the Corporation prior to final
      disposition thereof upon receipt of an undertaking by or on behalf of the
      director, officer or employee to repay such amount if it is ultimately
      determined hereunder that he is not entitled to indemnification or to the
      extent that the amount so advanced exceeds the indemnification to which he
      is ultimately determined to be entitled.

ITEM 29.  PRINCIPAL UNDERWRITERS

   
The principal underwriter of the Registrant's securities is Ohio National
Equities, Inc. ("ONEQ"). ONEQ is a wholly-owned subsidiary of the Depositor.
ONEQ also serves as the principal underwriter of securities issued by Ohio
National Variable Accounts B and D, other separate accounts of the Depositor
which are registered as unit investment trusts; and Ohio National Variable
Account R, a separate account of the Depositor's subsidiary, Ohio National Life
Assurance Corporation, which separate account is also registered as a unit
investment trust; and ONE Fund, Inc., an open-end investment company of the
management type.
    

                                       -6-
<PAGE>   41
   
The directors and officers of ONEQ are:
    


   
<TABLE>
<CAPTION>
      Name                               Position with ONEQ
      ----                               ------------------
<S>                                      <C>
      David B. O'Maley                   Chairman and Director
      John J. Palmer                     President & Chief Executive Officer and Director
      Thomas A. Barefield                Senior Vice President
      Trudy K. Backus                    Vice President and Director
      Joni L. Dunn                       Vice President and Compliance Officer
      Ronald L. Benedict                 Secretary and Director
      Kenneth M. Jaeger                  Treasurer
      James I. Miller II                 Vice President and Director
</TABLE>
    


The principal business address of each of the foregoing is One Financial Way,
Cincinnati, Ohio 45242.

   
During the last fiscal year, ONEQ received the following commissions and other
compensation, directly or indirectly, from the Registrant:
    

   
<TABLE>
<CAPTION>
Net Underwriting         Compensation
Discounts and            on Redemption         Brokerage
Commissions              or Annuitization      Commissions     Compensation
- -----------              ----------------      -----------     ------------
<C>                          <C>                  <C>              <C>
$                            None                 None             None
</TABLE>
    

ITEM 30.  LOCATION OF ACCOUNTS AND RECORDS

The books and records of the Registrant which are required under Section 31(a)
of the 1940 Act and Rules thereunder are maintained in the possession of the
following persons:

(1)      Journals and other records of original entry:

         The Ohio National Life Insurance Company ("Depositor")
         One Financial Way
         Cincinnati, Ohio  45242

                                       -7-
<PAGE>   42
         Star Bank, N.A. ("Custodian")
         425 Walnut Street
         Cincinnati, Ohio 45202

(2)      General and auxiliary ledgers:

         Depositor and Custodian

(3)      Securities records for portfolio securities:

         Custodian

(4)      Corporate charter, by-laws and minute books:

         Registrant has no such documents.

(5)      Records of brokerage orders:

         Not applicable.

(6)      Records of other portfolio transactions:

         Custodian

(7)      Records of options:

         Not applicable

(8)      Records of trial balances:

         Custodian

(9)      Quarterly records of allocation of brokerage orders and commissions:

         Not applicable

(10)     Records identifying persons or group authorizing portfolio 
         transactions:

         Depositor

(11)     Files of advisory materials:

         Not applicable

(12)     Other records

         Custodian and Depositor

ITEM 31.  MANAGEMENT SERVICES

Not applicable.

ITEM 32.  UNDERTAKINGS AND REPRESENTATIONS

Not applicable.
 

                                       -8-
<PAGE>   43
                                   SIGNATURES


   
As required by the Securities Act of 1933 and the Investment Company Act of     
1940, the registrant, Ohio National Variable Account A, has caused this 
post-effective amendment to the registration statement to be signed on its 
behalf in the City of Cincinnati and the State of Ohio on this 25th day of 
February, 1998.
    

                             OHIO NATIONAL VARIABLE ACCOUNT A
                                 (Registrant)

                             By THE OHIO NATIONAL LIFE INSURANCE COMPANY
                                              (Depositor)


   
                             By /s/ John J. Palmer
                               -----------------------------------------------
                               John J. Palmer, Senior Vice President,
                                                Strategic Initiatives
    

Attest:

/s/ Ronald L. Benedict
- ------------------------------------
Ronald L. Benedict
Corporate Vice President, Counsel
and Secretary


As required by the Securities Act of 1933 and the Investment Company Act of
1940, the depositor, The Ohio National Life Insurance Company, has caused this
post-effective amendment to the registration statement to be signed on its
behalf in the City of Cincinnati and the State of Ohio on the 25th day of
February, 1998.

                             THE OHIO NATIONAL LIFE INSURANCE COMPANY
                                                (Depositor)


   
                             By /s/ John J. Palmer
                               -----------------------------------------------
                               John J. Palmer, Senior Vice President,
                                                Strategic Initiatives
    

Attest:


   
/s/ Ronald L. Benedict
- ---------------------------------
Ronald L. Benedict
Corporate Vice President, Counsel
and Secretary
    

<PAGE>   44
As required by the Securities Act of 1933, this pre-effective amendment to the
registration statement has been signed below by the following persons in the
capacities and on the dates indicated.

   
<TABLE>
<CAPTION>
Signature                       Title                          Date
- ---------                       -----                          ----

<S>                         <C>                            <C>
 s/ David B. O'Maley        Chairman, President,           February 25, 1998
 --------------------       Chief Executive Officer
 David B. O'Maley           and Director           
                                                   

*s/ Neil A. Armstrong       Director                       February 25, 1998
- ---------------------
Neil A. Armstrong


*s/ Dale P. Brown           Director                       February 25, 1998
 --------------------
 Dale P. Brown


*s/ Jack E. Brown           Director                       February 25, 1998
 --------------------
 Jack E. Brown


*s/ William R. Burleigh     Director                       February 25, 1998
 --------------------
 William R. Burleigh


*s/ Victoria B. Buyniski    Director                       February 25, 1998
 --------------------
 Victoria B. Buyniski


*s/ Raymond R. Clark        Director                       February 25, 1998
 ------------------
 Raymond R. Clark


*s/ Alvin H. Crawford       Director                       February 25, 1998
 --------------------
 Alvin H. Crawford


*s/ Bannus B. Hudson        Director                       February 25, 1998
 --------------------
 Bannus B. Hudson


*s/ Charles S. Mechem, Jr.  Director                       February 25, 1998
 --------------------
 Charles S. Mechem, Jr.


*s/ James W. Nethercott     Director                       February 25, 1998
 ----------------------
 James W. Nethercott
</TABLE>
    

<PAGE>   45
   
<TABLE>
<S>                          <C>                            <C>
*s/ Oliver W. Waddell        Director                       February 25, 1998
 -----------------------                                    
 Oliver W. Waddell
                                                            
                                                            
*s/ Bradley L. Warnemunde    Chairman Emeritus and          February 25, 1998
 -----------------------     Director 
 Bradley L. Warnemunde       

*By s/  John J. Palmer
 -------------------------
   John J. Palmer, Attorney in Fact pursuant to Powers of Attorney, copies
   of which have previously been filed as exhibits to the Registrant's
   registration statement.
</TABLE>
    

<PAGE>   46
                         INDEX OF CONSENTS AND EXHIBITS

                                                                Page Number in
Exhibit                                                         Sequential
Number            Description                                   Numbering System
- ------            -----------                                   ----------------

   
                  Not Applicable
    





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