OHIO NATIONAL VARIABLE ACCOUNT A
485APOS, 1998-03-02
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<PAGE>   1
                                                              File No. 333-05848
                                                                        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>
<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 purchase payment is $100. Payments after the first payment may be
made at any time. Ohio National Life reserves the right to restrict total
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 13 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, Core Growth Portfolio, Growth & Income Portfolio, S&P 500 Index
Portfolio and Social Awareness Portfolio. Other Funds in which contract assets
may be invested are (a) the Emerging Markets Fund of the Montgomery Variable
Series and (b) the VIP High Income Portfolio, VIP Equity - Income Portfolio and
VIP Growth Portfolio of the Variable Insurance Products Fund. (See the
accompanying prospectuses of the Fund and of the Other Funds 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. After the first year, 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
    
<PAGE>   6
                                TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
<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
     Other Funds...........................................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.......................8
     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...................................9
     Annuity Period.......................................12
     Contract Owner Inquiries.............................15
     Performance Data.....................................15
Federal Tax Status........................................15
IRA Disclosure Statement..................................19
</TABLE>

                       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
    

                            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.

   
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%
</TABLE>

<TABLE>
<CAPTION>
<S>                                     <C>
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)
</TABLE>

<TABLE>
<CAPTION>
VAA ANNUAL EXPENSES (as a percentage
   of average account value)
<S>                                                     <C>  
Mortality and Expense Risk Fees ***                     1.05%
Account Fees and Expenses                               0.25%
                                                        -----
Total VAA Annual Expenses                               1.30%
</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%
Core Growth                                     0.95%            0.16%             1.11%
Growth & Income                                 0.85%            0.10%             0.95%
S&P 500 Index                                   0.40%            0.12%             0.52%
Social Awareness                                0.60%            0.35%             0.95%
Emerging Markets*                               1.19%            0.56%             1.75%
High Income                                     0.59%            0.12%             0.71%
Equity- Income                                  0.50%            0.08%             0.58%
Growth                                          0.60%            0.09%             0.69%
</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
                                            ------           -------           -------        --------
<S>                                           <C>             <C>               <C>              <C> 

Equity                                        $94             $126              $157             $248 
Money Market*                                  91              118               143              218
Bond                                           95              129               162              260
Omni                                           94              127               159              252
International                                  99              142               183              303
Capital Appreciation                           96              134               171              277
Small Cap                                      96              134               170              276
Global Contrarian                             100              145               188              313
Aggressive Growth                              97              135               172              279
Core Growth                                    98              139               178              292
Growth & Income                                96              134               171              277
</TABLE>
    


                                        3
<PAGE>   8
   
<TABLE>
<CAPTION>
<S>                                        <C>               <C>                 <C>              <C>
S&P 500 Index                              $   92            $ 122               150              233
Social Awareness                               96              134               171              277
Emerging Markets*                             104              157               208              353
High Income                                    94              127               159              252
Equity - Income                                93              124               153              239
Growth                                         94              127               158              250
</TABLE>
    

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            $  67             $ 115            $ 248
Money Market*                                  19               58               101              218
Bond                                           23               71               121              260
Omni                                           22               69               117              252
International                                  27               84               143              303
Capital Appreciation                           25               76               130              277
Small Cap                                      25               75               129              276
Global Contrarian                              28               87               148              313
Aggressive Growth                              25               76               131              279
Core Growth                                    26               81               138              292
Growth & Income                                25               76               130              277
S&P 500 Index                                  20               63               108              233
Social Awareness                               25               76               130              277
Emerging Markets*                              33              100               169              353
High Income                                    22               69               117              252
Equity - Income                                21               65               111              239
Growth                                         22               68               116              250
</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 DEDUCTION For STATE
PREMIUM TAXES, 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 $92 for a $1,000 contract
surrendered at the end of 1 year, $119 if surrendered at the end of 3 years,
$145 if surrendered at the end of 5 years or $223 if surrendered at the end of
10 years. For a $1,000 contract not surrendered, the expenses without the waiver
would be $19 for 1 year, $60 for 3 years, $103 for 5 years or $223 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 $104 for a $1,000 contract surrendered at the end of 1
year, $158 if surrendered at the end of 3 years, $211 if surrendered at the end
of 5 years or $359 if surrendered at the end of 10 years. For a $1,000 contract
not surrendered, the expenses without the waiver would be $33 for 1 year, $101 
for 3 years, $172 for 5 years or $359 for 10 years. 
    

   
    

   
*** The Mortality and Expense risk fees may be changed at any time, but may not
    be increased to more than 1.55%. Ohio National Life has agreed that the fees
    will not be increased on any contract issued pursuant to this prospectus.
    See Deduction for Risk Undertakings, page 8.
    
     
   
                            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                  $11.847503                   210,014


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                         $10.300720                       102,555


Bond 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                         $10.837736                         47,241


Omni 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                         $11.726674                       276,040


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                         $ 9.868874                       274,724


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                         $11.402771                       136,072


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                         $12.723535                       154,909


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                         $10.754700                       115,149


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                         $12.392742                         38,689


Core 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                         $11.353867                         70,774


Growth & 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                         $13.683786                       176,611


S&P 500 Index 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                         $12.707473                       164,052


Social Awareness 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                         $13.239397                         22,155


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                         $  9.174160                        56,016


High 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                         $11.694830                       118,713


Equity-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                         $12.504442                       133,739


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                         $12.484707                        81,290



*   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 4.19%.
</TABLE>
    

FINANCIAL STATEMENTS

The complete financial statements of VAA and Ohio National Life, and the
Independent Auditors' Reports thereon, may be found in the Statement of
Additional Information.

                                        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, Core Growth Portfolio, Growth & Income Portfolio, or Social Awareness
Portfolio; assets of the Emerging Markets subaccount are invested in shares of
the Emerging Markets Fund; assets of the VIP High Income subaccount, VIP Equity
- - Income subaccount and VIP Growth subaccount are invested in corresponding
Portfolios of the Variable Insurance Products Fund (VIP). 

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), Pilgrim Baxter & Associates, Ltd. (subadviser
to the Core Growth Portfolio) and Robertson Stephens Investment Management,
L.P. (subadviser to the Growth & Income Portfolio). 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.
    

                                        5
<PAGE>   10
OTHER FUNDS

The Other Funds are presently the Emerging Markets Fund and the High Income,
Equity-Income and Growth Portfolios. The Emerging Markets Fund is a series of
the Montgomery Funds III and is managed, for a fee, by Montgomery Asset
Management, L.P. The VIP High Income, VIP Equity-Income and VIP Growth
Portfolios are series of the Variable Insurance Products Fund (VIP) and are
managed, for a fee, by Fidelity Management & Research Company. The Montgomery
Fund III and the Variable Insurance Products Fund (VIP) are registered,
open-end, investment companies the shares of which are sold only to insurance
company separate accounts to fund variable annuity contracts and variable life
insurance policies. The value of investments in the Other Funds 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 Other Funds, including their investment objectives, see their
accompanying prospectuses. Read the prospectuses carefully before investing.
(They contain information about additional funds that are not available for the
contract offered herein.) 

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 Other Funds 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 an 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 of an Other 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.

                                        6
<PAGE>   11
                   DISTRIBUTION OF VARIABLE ANNUITY CONTRACTS

   
The variable annuity contracts are sold by Ohio National Life insurance agents
who are also registered representatives of (a) The O.N. Equity Sales Company
("ONESCO"), a wholly-owned subsidiary of Ohio National Life, or (b) 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 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 6.45% of purchase payments. ONEQ then pays a portion of that
amount to ONESCO and the other broker-dealers as compensation for their sales
efforts. 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. 
    

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

   
On or after the first contract anniversary, partial withdrawals of not more than
10% of 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. 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.

                                        7
<PAGE>   12
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 1.05% of the contract value on
an annual basis. That deduction may be decreased by Ohio National Life at any
time and may be increased not more frequently then annually to not more than
1.55% on an annual basis. However, Ohio National Life has agreed that the
deduction for these risk undertakings for contracts purchased on and after
November 1, 1997 shall not be increased to more than the rate in effect at the
time the contract is issued. Ohio National Life may discontinue this limitation
on its right to increase the deduction, but only as to contracts purchased after
notice of such discontinuance. 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 0.55% for mortality risk, and
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 Other Funds.

                    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.

                                       8
<PAGE>   13
ACCUMULATION PERIOD
PURCHASE PAYMENT PROVISIONS

   
The contracts provide for minimum purchase payments of $100. 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 10).
    

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.

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

                                       9
<PAGE>   14
      (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.

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 17.
For tax consequences of a surrender or withdrawal, see Federal Tax Status, 
page 16.

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

                                       10
<PAGE>   15
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 14). 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 other subaccount(s), if the DCA program is established at the
time the contract is issued, 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. Each DCA
transfer must be at least $300 and at least 12 DCA transfers must be scheduled.
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.
    

   
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.
    

   
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.
    

   
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.
    

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 in a
single sum into an interest-bearing checking account established in the
beneficiary's name with Bank One, Springfield, Illinois, unless the owner or
beneficiary elects settlement under one or more of the settlement options
provided in the contract. The checking account will bear interest based upon
then current money market rates. The beneficiary will then be able to write
checks against such amount at any time and in any amount up to the total in the
account. These checks must be for a minimum of $250.
    


                                       11
<PAGE>   16
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; or
(c) the stepped-up death benefit amount if the contract has been in effect for
at least 5 years. For the 5-year period beginning on the fifth contract
anniversary, the stepped-up death benefit will be the greater of (i) the
contract value as of the fifth anniversary or (ii) the net of purchase payments
less withdrawals made on or before the fifth anniversary. At the beginning of
each later 5-year period (until the annuitant attains age 70), 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 5-year period. The
stepped-up death benefit amount is increased by purchase payments and decreased
by withdrawals made during each 5-year period after the fifth 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.

TEXAS STATE OPTIONAL RETIREMENT PROGRAM

Under the Texas State Optional Retirement Program (the "Program"), purchase
payments may be excluded from the gross income of state employees for federal
tax purposes to the extent that such purchase payments do not exceed the
exclusion allowance provided by the Code. The Attorney General of Texas has
interpreted the Program as prohibiting any participating state employee from
receiving the surrender value of a contract funding benefits under the Program
prior to termination of employment or the state employee's retirement, death or
total disability. Therefore, no surrender or partial withdrawal by a participant
in the Program will be allowed until the first of these events occurs.

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 Option 1(e) are permitted at any time.

                                       12
<PAGE>   17
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 annuities 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 16), 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.
    

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.
    

                                       13
<PAGE>   18
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 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.

                                       14
<PAGE>   19
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 the Other Funds.

SUBSTITUTION FOR FUND SHARES

If investment in the Fund or any 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 Funds 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.
    

                                       15
<PAGE>   20
                               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

                                       16
<PAGE>   21
   
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.
    

                                       17
<PAGE>   22
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.

                                       18
<PAGE>   23
                                   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

   
P. O. Box 2669
Variable Annuity Administration
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 $10,000 for 1998.
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.
    

                                       19
<PAGE>   24
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.)

                                       20
<PAGE>   25
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 premature 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.

                                       21
<PAGE>   26
                     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>              <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
</TABLE>

* Guaranteed Interest Rate: 3.00% is applicable to each contract anniversary.

* The Surrender Value is the Accumulation Values less the Contingent Deferred
  Sales Charge.

                                       22
<PAGE>   27
                                     PART B

                       STATEMENT OF ADDITIONAL INFORMATION
<PAGE>   28
                        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 of Contents

   
<TABLE>
<CAPTION>
<S>               <C>                                                                <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>
    

                                   "EXPLORER"
                                VARIABLE ANNUITY
<PAGE>   29
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>                   <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
aggregated and retained commissions have been:

<TABLE>
<CAPTION>
                        Aggregate             Retained
          Year          Commissions          Commissions
          ----          -----------          -----------
<S>       <C>           <C>                   <C>  
          1997          $                     $   
</TABLE>
    


                                       -2-
<PAGE>   30
CALCULATION OF MONEY MARKET SUBACCOUNT YIELD

   
The current yield of the Money Market subaccount for the seven days ended on
December 31, 1997, was 4.19%. 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 March 25, 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 or Other Funds. Note also
that, for purposes of these calculations, the annual contract administration
charge of $35 has been converted to an annualized percentage charge of 0.18%.
This is based upon an estimated average accumulation value of $19,000 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>   <C>
Equity                              16.65%         13.79%       12.16%           9.65%        10-06-69
Money Market                         4.02%          3.23%        4.18%           5.92%        03-20-80
Bond                                 7.88%          6.10%        6.91%           7.31%        11-02-82
Omni                                16.63%         12.01%       11.12%          10.61%        09-10-84
</TABLE>
    


                                       -3-
<PAGE>   31
   
<TABLE>
<CAPTION>
                                    One            Five           Ten           From         Inception
                                    Year           Years         Years        Inception         Date  
                                    ----           -----         -----        ---------       --------
<S>                                 <C>              <C>          <C>           <C>            <C>   
International                        0.80%           N/A          N/A          11.58%         04-30-93
Capital Appreciation                13.71%           N/A          N/A          14.24%         05-01-94
Small Cap                            7.08%           N/A          N/A          20.20%         05-01-94
Global Contrarian                   10.23%           N/A          N/A          10.49%         03-31-95
Aggressive Growth                   11.08%           N/A          N/A          13.12%         03-31-95
Core Growth                           N/A            N/A          N/A          (4.33)%        01-03-97
Growth & Income                       N/A            N/A          N/A          34.82          01-03-97
S&P 500 Index                         N/A            N/A          N/A          30.28          01-03-97
Social Awareness                      N/A            N/A          N/A          24.02          01-03-97
Emerging Markets                                     N/A          N/A                         02-02-96
High Income                                                                      N/A          09-19-85
Equity-Income                                                                    N/A          10-09-86
Growth                                                                           N/A          10-09-86
</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>   32
                                    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 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>   33
   
Ohio National Life guarantees that the guaranteed 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 values, and less (d) any partial
withdrawals, loans and transfers from the guaranteed 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 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.

                                      -6-


    

<PAGE>   34
                        OHIO NATIONAL VARIABLE ACCOUNT A

                                    FORM N-4

                                     PART C

                                OTHER INFORMATION
<PAGE>   35
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>   36
(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-3, was filed as Exhibit (4) of
       the Registrant's registration statement on October 2, 1996 (File no. 
       333-14375).

(5)    Variable Annuity Application, Form V-4896-A, was filed as Exhibit (5) of
       the Registrant's registration statement on October 2, 1996 (File no.
       333-14375).


(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).
    

                                      -2-

(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.

<PAGE>   37
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 Service

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

Michael A. Boedeker*                       Vice President, Fixed Income Securities

Robert A. 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>   38
   
<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.                     Director
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>   39

<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>   40
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, 1997, 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>   41
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>   42
   
The directors and officers of ONEQ are:
    


   
<TABLE>
<CAPTION>
      Name                                 Position with ONEQ
<S>   <C>                                  <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
<S>                                 <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>   43

         Star Bank, N. A.
         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>   44
                                   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>   45

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.


   
Signature                      Title                      Date
- ---------                      -----                      ----


 /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
    


<PAGE>   46



   
*/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.
    


<PAGE>   47





                         INDEX OF CONSENTS AND EXHIBITS


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

   
             Not applicable                   
    













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