KEYSTONE TAX FREE FUND
N14AE24, 1995-11-21
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   As filed with the Securities and Exchange Commission on November 20, 1995.

                                                   Registration No. 2-58699
                                                                   811-2740


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM N-14

             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

      Pre - Effective Amendment No.                          ____

      Post - Effective Amendment No.                          27


                             KEYSTONE TAX FREE FUND
                             ----------------------
               (Exact Name of Registrant as Specified in Charter)



                200 BERKELEY STREET, BOSTON, MASSACHUSETTS 02116
                ------------------------------------------------
                    (Address of Principal Executive Offices)

                                  617-338-3200
                        (Area Code and Telephone Number)

                          Rosemary D. Van Antwerp, Esq.
                              Keystone Group, Inc.
                               200 Berkeley Street
                           Boston, Massachusetts 02116

                   ---------------------------------------
                   (Name and Address of Agent for Service)



      Approximate Date of Proposed Public Offering:  As soon as practicable
after this Registration Statement becomes effective.

      The Registrant has registered an indefinite amount of securities under the
Securities Act of 1933 pursuant to Rule 24f-2 under the Investment Company Act
of 1940; accordingly, no fee is payable herewith. Registrant's Rule 24f-2 Notice
for the fiscal year ended December 31, 1994 was filed with the Securities and
Exchange Commission on January 27, 1995.

      It is proposed that this filing will become effective on December 20, 1995
pursuant to Rule 488.

#101F0251



<PAGE>



                             KEYSTONE TAX FREE FUND


                       CONTENTS OF REGISTRATION STATEMENT



This Registration Statement contains the following pages and documents:

                                   Front Cover

                                  Contents Page

                            The Cross-Reference Sheet


                                     PART A
                                     ------

                             Letter to Shareholders

                    Notice of Special Meeting of Shareholders

                           Prospectus/Proxy Statement


                                     PART B
                                     ------

                       Statement of Additional Information


                                     Part C
                                     ------

                                Other Information

                                 Indemnification

                                List of Exhibits

                                  Undertakings

                                   Signatures

                                    Exhibits





<PAGE>



                             KEYSTONE TAX FREE FUND


                              CROSS REFERENCE SHEET



Pursuant to Rule 481(a) under the Securities Act of 1933


                                          Prospectus/Proxy Statement
Form N-14 Item No.                        Caption
- ------------------                        --------------------------

Part A

1     Beginning of Registration           Cross-Reference Sheet; Front
      Statement and Outside Front         Cover
      Cover Page of Prospectus

2     Beginning and Outside Back          Table of Contents
      Cover Page of Prospectus

3     Synopsis and Risk Factors           Synopsis; Principal Risk
                                          Factors; The Reorganization

4     Information About the               Synopsis; The Reorganization
      Transaction

5     Information About the               Information About the Funds;  
      Registrant                          Additional Information About
                                          the Funds

6     Information About the               Information About the Funds;
      Company Being Acquired              Additional Information About
                                          the Funds

7     Voting Information                  Inside Front Cover Page; The
                                          Reorganization; Information
                                          About the Funds

8     Interest of Certain                 Additional Information About
      Persons and Experts                 the Funds

9     Additional Information              Not Applicable
      Required for Reoffering
      by Persons Deemed to be
      Underwriters


<PAGE>



                                          Statement of Additional Information
Form N-14 Item No.                        Caption
- ------------------                        -----------------------------------

Part B

10    Cover Page                          Cover Page

11    Table of Contents                   Cover Page

12    Additional Information              Cover Page; Statement of
      About the Registrant                Additional Information of
                                          Registrant

13    Additional Information              Not Applicable
      About the Company Being
      Acquired

14    Financial Statements                Financial Information


                                          Other Information
Form N-14 Item No.                        Caption
- ------------------                        -----------------

Part C

15    Indemnification                     Indemnification

16    Exhibits                            Exhibits

17    Undertakings                        Undertakings






<PAGE>


























                                     PART A





<PAGE>


January, 1996 


Dear Shareholder: 

We are writing to ask your support for a proposal which we expect will result 
in reduced expenses for your Keystone investment in the Fund. 


The proposal is for Keystone Tax Exempt Trust to be acquired by, or 
effectively merged with, Keystone Tax Free Fund. This proposal is scheduled 
to be voted upon at a shareholder meeting at Keystone Investments, 200 
Berkeley Street, Boston, Massachusetts at 2 p.m. on February 20, 1996. 


The merger will be a tax-free transaction for shareholders. We believe it 
will result in one combined fund with lower management fees and the potential 
for lower operating expenses and greater efficiencies than two separate 
funds. This merger is not expected to affect the total value of your 
investment. The investment objective, strategy, and portfolio manager of your 
Fund also will remain the same. 

Summary of Benefits 

(bullet) Lower management fee and operating expenses 
(bullet) Potential for greater operating efficiencies 

The Fund's Trustees have very carefully reviewed this proposed reorganization 
and believe it is in the best interests of shareholders. They recommend you 
vote FOR the proposal, which is described in detail in the enclosed 
Prospectus/Proxy Statement. 

Voting Instructions 

This package contains the materials you will need to vote. To vote by mail, 
please sign the enclosed proxy card and return it in the postage-paid 
envelope today. It is extremely important that you vote, no matter how many 
shares you own. This is an opportunity to voice your opinion on an important 
matter affecting your investment. Voting promptly helps to reduce the cost of 
additional mailings. 

If you have questions, please contact your adviser or call Keystone. Our 
representatives will be happy to assist you. 

Sincerely, 

Albert H. Elfner, III             George S. Bissell 
Chairman and President            Chairman of the Board 
Keystone Investments, Inc.        Keystone Funds 

<PAGE>
 

                          KEYSTONE TAX EXEMPT TRUST 
                             200 Berkeley Street 
                         Boston, Massachusetts 02116 
              Telephone Number (800) 343-2898 or (617) 621-6100 

                  NOTICE OF SPECIAL MEETING OF SHAREHOLDERS 
                       To be held on February 20, 1996 


To the Shareholders: 


   A meeting of the shareholders of Keystone Tax Exempt Trust ("KTET") will 
be held at the offices of Keystone Investment Management Company, 200 
Berkeley Street, Boston, Massachusetts, on the 26th Floor, on Tuesday, 
February 20, 1996 at 2:00 p.m. Eastern time for the following purposes: 


   1. To approve an Agreement and Plan of Reorganization whereby Keystone Tax 
Free Fund ("KTFF") will acquire all of the assets of KTET in exchange for 
Shares of KTFF and will assume the liabilities of KTET, as described in the 
accompanying Prospectus/Proxy Statement. 

   2. To transact such other business as may properly come before the meeting 
and any adjournments thereof. 


   Shareholders of record at the close of business as of December 20, 1995 
are entitled to notice of and to vote at this meeting and any adjournments 
thereof. 


                                            BY ORDER OF THE BOARD OF TRUSTEES, 

                                            Rosemary D. Van Antwerp 
                                            Secretary 


January 2, 1996 


Please complete, date and sign your proxy-NOW-and mail it-TODAY-in the 
stamped envelope enclosed for your convenience. In order to avoid unnecessary 
expense or delay, we ask your cooperation in mailing in your proxy. Thank 
you. 

<PAGE>
 

                          PROSPECTUS/PROXY STATEMENT 
                              December 20, 1995 



                         Acquisition of the Assets of 

                          KEYSTONE TAX EXEMPT TRUST 
               200 Berkeley Street, Boston, Massachusetts 02116 
              Telephone Number (800) 343-2898 or (617) 621-6100 

                       By and in exchange for Shares of 

                            KEYSTONE TAX FREE FUND 
               200 Berkeley Street, Boston, Massachusetts 02116 
              Telephone Number (800) 343-2898 or (617) 621-6100 

   This Prospectus/Proxy Statement is being furnished to the shareholders of 
Keystone Tax Exempt Trust ("KTET") in connection with a proposal for the tax- 
free reorganization of the Fund into Keystone Tax Free Fund. It is proposed 
that Keystone Tax Free Fund ("KTFF") acquire all of the assets of KTET in 
exchange for Shares of KTFF and assume the liabilities of KTET. Immediately 
following this transfer, Shares of KTFF will be distributed to the 
shareholders of KTET in place of their Shares of KTET, and KTET will be 
terminated and its Shares cancelled. As a result of the proposed transaction, 
each shareholder of KTET will receive that number of full and fractional 
Shares of KTFF having a total net asset value, on the effective date of the 
proposed transaction, equal to the total net asset value of that 
shareholder's Shares in KTET. 

   KTFF and KTET (individually, a "Fund," and collectively, the "Funds") are 
open-end, diversified management investment companies. Keystone Management, 
Inc. manages both Funds, and Keystone Investment Management Company advises 
both Funds. Both Funds seek the highest possible current income, exempt from 
federal income taxes, while preserving capital. 


   This Prospectus/Proxy Statement sets forth concisely the information about 
KTFF that a prospective investor should know before investing and should be 
retained for future reference. This Prospectus/Proxy Statement is accompanied 
by the Prospectus of KTFF dated April 28, 1995, which has been filed with the 
Securities and Exchange Commission (the "Commission") and is incorporated by 
reference herein. Additional information about KTFF is contained in a 
Statement of Additional Information ("SAI") dated April 28, 1995, and in a 
SAI dated December 20, 1995 relating to the Reorganization, each of which has 
been filed with the Commission and is incorporated by reference herein. 
Copies of these SAIs may be obtained without charge by writing to KTFF at the 
address or by calling the telephone numbers listed above. KTFF's most recent 
Annual Report and most recent Semi-Annual Report, each of which has been 
filed with the Commission, 



                                      1 
<PAGE>
 
are incorporated by reference herein. Copies of KTFF's most recent Annual and 
Semi-Annual Reports may be obtained without charge by writing to KTFF at the 
address or by calling the telephone numbers listed above. 

   A Prospectus and SAI containing additional information about KTET, each 
dated March 31, 1995, have been filed with the Commission and are 
incorporated by reference herein. Copies of such Prospectus and SAI may be 
obtained without charge by writing to KTET at the address listed above or by 
calling the telephone numbers listed above. 

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND 
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES 
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE 
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY 
IS A CRIMINAL OFFENSE. 

                                      2 
<PAGE>
 
                           KEYSTONE TAX EXEMPT TRUST
                             200 Berkeley Street 
                         Boston, Massachusetts 02116 


                       Special Meeting of Shareholders 
                         To be Held February 20, 1996 



   This Prospectus/Proxy Statement is furnished to shareholders of Keystone 
Tax Exempt Trust ("KTET") in connection with the solicitation of proxies by 
the Board of Trustees to be used at a meeting of the shareholders (the 
"Meeting") to be held at the offices of Keystone Investment Management 
Company, 200 Berkeley Street, Boston, Massachusetts, on the 26th Floor, on 
Tuesday, February 20, 1996, at 2:00 p.m. Eastern time. 



   Any proxy that is properly executed and returned in time to be voted at 
the Meeting, the KTET Shares represented thereby will be voted in accordance 
with the instructions thereon. In the absence of such instructions, the proxy 
will be voted in favor of the approval of the Agreement and Plan of 
Reorganization (the "Reorganization Agreement") and the transaction described 
therein, whereby Keystone Tax Free Fund ("KTFF") will acquire all of the 
assets of KTET in exchange for Shares of KTFF and assume the liabilities of 
KTET. The individuals duly appointed as Proxies ("Proxies") may, in their 
discretion, vote upon such other matters as may come before the meeting or 
any adjournments thereof. Any shareholder may revoke his or her proxy at any 
time before it is voted by delivering written notice of revocation or by 
executing and delivering a later-dated proxy to Rosemary D. Van Antwerp, 
Keystone Investment Management Company, 200 Berkeley Street, Boston, 
Massachusetts 02116, or by appearing in person at the meeting to vote his or 
her Shares. Proxy material is expected to be mailed to KTET shareholders on 
or about January 2, 1996. 



   When voting proxies on a proposal to adjourn, the Proxies will consider 
what is in the best interest of all shareholders at that time. Each 
shareholder will be entitled to one vote for each Share and a fractional vote 
for each fractional Share held by such shareholder. Shareholders of KTET of 
record at the close of business on December 20, 1995 (the "Record Date") will 
be entitled to notice of and to vote at the Meeting or any adjournment 
thereof. On the Record Date, there were             Shares of KTET 
outstanding. 


Vote Required 
Approval of the Reorganization Agreement will require the affirmative vote of 
the holders of (i) 67% of the Shares represented at the Meeting, if the 
holders of more than 50% of the outstanding Shares of KTET are represented, 
or (ii) more than 50% of KTET's outstanding Shares, whichever is less. 
Shareholders of KTFF will not be voting on the approval of the Reorganization 
Agreement since their approval is not required. 

                                      3 
<PAGE>
 
                             IMPORTANT DEFINITIONS
<TABLE>
<CAPTION>
<S>                         <C>
"12b-1 Plan"                A distribution plan adopted pursuant to 
                            Rule 12b-1 under the Investment Company 
                            Act of 1940, as amended. 

"1933 Act"                  The Securities Act of 1933, as amended. 

"1934 Act"                  The Securities Exchange Act of 1934, as 
                            amended. 

"1940 Act"                  The Investment Company Act of 1940, as 
                            amended. 

"Effective Date"            The effective date of the Reorganization 
                            contemplated by the Reorganization 
                            Agreement. 

"KTET"                      Keystone Tax Exempt Trust, 200 Berkeley 
                            Street, Boston, Massachusetts 02116. 

"KTFF"                      Keystone Tax Free Fund, 200 Berkeley 
                            Street, Boston, Massachusetts 02116. 

"Independent Trustees"      Those members of the Board of Trustees of 
                            KTET or KTFF who are not "interested 
                            persons" of such Funds, as said term is 
                            defined in the 1940 Act. 

"Principal Underwriter"     Keystone Investment Distributors Company 
                            (formerly named Keystone Distributors, 
                            Inc.), 200 Berkeley Street, Boston, 
                            Massachusetts 02116, a wholly-owned 
                            subsidiary of Keystone. The Principal 
                            Underwriter is the principal underwriter 
                            of KTET and KTFF and of each of the other 
                            Keystone Investments Funds. 

"Keystone"                  Keystone Investment Management Company 
                            (formerly named Keystone Custodian Funds, 
                            Inc.), 200 Berkeley Street, Boston, 
                            Massachusetts 02116, a wholly-owned 
                            subsidiary of Keystone Investments. 
                            Keystone is the investment adviser of KTET 
                            and KTFF and of each of the other Keystone 
                            Investments Funds. 

"Keystone Investments"      Keystone Investments, Inc. (formerly named 
                            Keystone Group, Inc.), 200 Berkeley 
                            Street, Boston, Massachusetts 02116. 
                            Keystone Investments owns all of the 
                            outstanding shares of Keystone. Keystone 
                            Investments is owned by an investor group 
                            composed of current and former members of 
                            management and certain employees of 
                            Keystone Investments and its affiliates. 

"Keystone Fund Family"      A group of 13 mutual funds with different 
                            investment objectives and policies that 
                            hold themselves out to investors as being 
                            related for purposes of 
                            

                                      4 
<PAGE>
 
                            investments, investor services and 
                            exchange privileges. 

"Keystone Investments       A family of mutual funds with varying 
  Funds"                    investment objectives and policies, 
                            managed, advised or administered by 
                            Keystone and/or an affiliate of Keystone. 
                            Currently, there are 30 Keystone 
                            Investments Funds, including KTET and 
                            KTFF. 

"Keystone Management"       Keystone Management, Inc., 200 Berkeley 
                            Street, Boston, Massachusetts 02116, a 
                            wholly-owned subsidiary of Keystone. 
                            Keystone Management is the investment 
                            manager of 20 Keystone Investments Funds, 
                            including KTET and KTFF. 

"KIRC"                      Keystone Investor Resource Center, Inc., 
                            101 Main Street, Cambridge, Massachusetts 
                            02142, a wholly-owned subsidiary of 
                            Keystone. KIRC is the transfer agent and 
                            dividend disbursing agent for each of the 
                            Keystone Investments Funds, including KTET 
                            and KTFF. 

"Meeting"                   The Special Meeting of KTET Shareholders 
                            to be held on Tuesday, February 20, 1996. 

"Reorganization"            The proposed transaction contemplated by 
                            the Reorganization Agreement. 

"Reorganization             The Agreement and Plan of Reorganization 
  Agreement"                between KTET and KTFF, dated October 16, 
                            1995, pursuant to which KTFF will acquire 
                            all of the assets of KTET in exchange for 
                            Shares of KTFF and will assume the 
                            liabilities of KTET. 

"Shares"                    The Shares of beneficial interest of KTFF, 
                            KTET and the other Keystone Investments 
                            Funds. 
</TABLE>

                                   SYNOPSIS 

Description of the Proposed Transaction 
The Board of Trustees of each Fund, including each Fund's Independent 
Trustees, have unanimously approved the Reorganization Agreement, which 
provides for the transfer of all of the assets of KTET to KTFF in exchange 
for Shares of KTFF as well as the assumption of KTET's liabilities by KTFF. 
(The proposed transaction is hereinafter referred to as the 
"Reorganization".) 

   The aggregate net asset value of KTFF Shares to be issued in exchange for 
the assets of KTET will be equal to the net asset value of KTET on the 
effective date of the Reorganization (the "Effective Date") (as defined in 
"The Reorganization--Agreement on Transfer of Assets"). Immediately following 
the 

                                      5 
<PAGE>
 
transfer of assets and liabilities of KTET to KTFF, Shares of KTFF will be 
distributed to the shareholders of KTET, then KTET will be dissolved. KTET 
Shares will be cancelled, and KTET will be terminated. Each shareholder in 
KTET will receive that percentage of the total number of KTFF Shares received 
by KTET equal in amount to that shareholder's percentage interest in KTET on 
the Effective Date. 

   The Reorganization will effectively combine the two nearly identical 
Funds, each of which currently issues a single class of Shares, into a single 
fund offering a single class of Shares. 

   For the reasons set forth below in "The Reorganization--Reasons for the 
Proposed Transaction", the Board of Trustees of KTET, including the 
Independent Trustees, has concluded that the Reorganization would be in the 
best interests of the shareholders of KTET and has further determined that 
the interests of the existing shareholders of KTET will not be diluted as a 
result of the Reorganization. Accordingly, the Board recommends A VOTE FOR 
the approval of the Reorganization. 

Comparison of the Funds 

Fee Table 
The fee table set out below shows the current fees for each Fund and pro 
forma fees for KTFF after giving effect to the proposed transaction. The 
purpose of the fee table is to assist shareholders in understanding the costs 
and expenses that he or she is exected to bear directly or in directly in 
KTFF after giving effect to the proposed transaction. 

<TABLE>
<CAPTION>
                                                                    KTFF 
Shareholder Transaction Expenses               KTFF     KTET     PRO FORMA 
- -------------------------------------------   -----    -----     ---------- 
<S>                                            <C>      <C>       <C>
Contingent Deferred Sales Charge(1)             4.00%    4.00%      4.00 % 
(as a percentage of the lesser of total 
  cost or net asset value of shares 
  redeemed) 
Exchange Fee(2)                               $10.00   $10.00     $10.00 
(per exchange) 
</TABLE>

   (1) The deferred sales charge declines from 4% to 1% of amounts redeemed 
within four calendar years after purchase. No deferred sales charge is 
imposed thereafter. 

   (2) There is no exchange fee for exchange orders received by the Fund from 
an individual shareholder over the Keystone Automated Response Line ("KARL"). 

                                      6 
<PAGE>
 
<TABLE>
<CAPTION>
                                                             KTFF 
Annual Fund Operating Expenses(3)        KTFF    KTET     PRO FORMA 
- --------------------------------------   ----    ----     ---------- 
<S>                                       <C>     <C>      <C>
(As a percentage of average net 
  assets) 
Management Fees                           0.43%   0.47%    0.42%
12b-1 Fees(4)                             0.61%   1.00%    0.38%
Other Expenses                            0.15%   0.18%    0.17%
                                          ----    ----     -----
Total Fund Operating Expenses             1.19%   1.65%    0.97%
                                          ====    ====     ====
</TABLE>

Examples(5) 

You would pay the following expenses on a $1,000 investment, assuming 5% 
annual return and: 

(1) redemption at the end of each period: 

<TABLE>
<CAPTION>
                              KTFF 
           KTFF   KTET     PRO FORMA 
           ---    ---     ---------- 
<S>        <C>     <C>      <C>
 1 year    $ 52    $ 57     $ 50
 3 years   $ 58    $ 72     $ 51
 5 years   $ 65    $ 90     $ 54
10 years   $144    $195     $119
</TABLE>

(2) no redemption: 

<TABLE>
<CAPTION>
                              KTFF 
           KTFF   KTET     PRO FORMA 
           ---    ---     ---------- 
<S>         <C>    <C>      <C>
 1 year     $ 12   $ 17     $ 10
 3 years    $ 38   $ 52     $ 31
 5 years    $ 65   $ 90     $ 54
10 years    $144   $195     $119
</TABLE>

   (3) To reflect current fees, expense ratios are estimated for KTFF's 
fiscal year ending December 31, 1995. The estimated expense ratios reflect 
certain actions taken by the Fund's Board of Trustees, in connection with the 
reopening of KTFF on May 1, 1995, with respect to the maximum annual 
expenditures permitted under KTFF's Distribution Plan. Expense ratios are for 
KTET's fiscal year ended November 30, 1994. 

   (4) Long-term shareholders may pay more than the economic equivalent of 
the maximum front end sales charge permitted by rules adopted by the National 
Association of Securities Dealers, Inc. ("NASD"). See "Distribution Plan." 

   (5) The Securities and Exchange Commission requires use of a 5% annual 
return figure for purposes of this example. Actual return for the Fund may be 
greater or less than 5%. 

   Amounts shown in the example should not be considered a representation of 
past or future expenses; actual expenses may be greater or less than those 
shown. 

                                      7 
<PAGE>
 
Investment Objectives and Policies 

Each Fund's investment objective, policies and restrictions do not materially 
differ. Each Fund seeks the highest possible current income, exempt from 
federal income taxes, while preserving capital. Each Fund invests 
substantially all and, under ordinary circumstances, at least 80% of its 
assets in federally tax-exempt obligations, including municipal bonds and 
notes and tax-exempt commercial paper (municipal bonds), which are 
obligations issued by or on behalf of states, territories and possessions of 
the United States ("U.S."), the District of Columbia and their political 
subdivisions, agencies and instrumentalities, the interest from which is, in 
the opinion of counsel to the issuers of such bonds, exempt from federal 
income taxes, including the alternative minimum tax. Each Fund invests in 
municipal bonds only if, at the date of investment, they are rated within the 
four highest grades by Standard & Poor's Corporation ("S&P") (AAA, AA, A and 
BBB), by Moody's Investors Service, Inc. ("Moody's") (Aaa, Aa A and Baa) or 
by Fitch Investors Service, Inc.--Municipal Division ("Fitch") (AAA, AA, A 
and BBB), or, if not rated, are of comparable quality to obligations so rated 
as determined by Keystone. Keystone expects that under normal circumstances 
at least 65% of the Fund's total assets will be invested in municipal bonds 
within the three highest ratings of such services or, if not rated, will be 
of comparable quality. In addition, in furtherance of their investment 
objectives, both Funds may use certain derivative instruments, including 
structured securities. In summary, both Funds are authorized to invest in the 
same kinds of securities and to use the same types of investment techniques. 
For further discussion of the Funds' investment objectives, policies, 
restrictions, permitted investments and investment techniques, see 
"Information About the Funds" and the Prospectuses of KTFF and KTET. 

Performance Information 
Discussions of the manner of calculation of total return and yield quotations 
are contained in each Fund's Prospectus and Statement of additional 
Information. 

   KTFF's cumulative total returns for the one, five and ten years ended 
December 31, 1994 were (9.96)% (including contingent deferred sales charge), 
30.92% and 124.42%, respectively. KTFF's average annual rotal returns for the 
one, five and ten year periods ended December 31, 1994 were (9.96)%, 5.54% 
and 8.42%, respectively. 


   KTET's cumulative total return for the period beginning October 7, 1985 
(commencment of investment operations) through November 30, 1994 was 85.41%. 
KTET's average annual total return for the one and five year periods ended 
November 30, 1994 were (7.10)% and 26.79%, respectively. KTET's average 
annual compounded rate of returns for the five year period ended November 30, 
1994 and for the period beginning October 7, 1985 through November 30, 1994 
were 4.86% and 6.98%, respectively. 


Investment Advisory and Management Fees 
Keystone Management serves as the investment manager to each of the Funds. As 
compensation for investment management and other services and facili-

                                      8 
<PAGE>
 
ties provided by Keystone Management, each Fund pays Keystone Management at 
the end of each calendar month a fee consisting of (1) an amount calculated 
as follows: 

<TABLE>
<CAPTION>
                          Aggregate Net Asset 
                                 Value 
Annual                    of the Shares of the 
Management Fee                    Fund 
- --------------------    ------------------------ 
<S>                     <C>
            2% of Gross Dividend and 
               Interest Income plus 
0.50% of the first         $100,000,000, plus 
0.45% of the next          $100,000,000, plus 
0.40% of the next          $100,000,000, plus 
0.35% of the next          $100,000,000, plus 
0.30% of the next          $100,000,000, plus 
0.25% of amounts 
  over                     $ 500,000,000 
</TABLE>


and (2) an amount equal to the amount of reimbursable expenses of Keystone 
Management accrued during such calendar month. 



   For the fiscal year ended November 30, 1994, KTET paid Keystone Management 
fees of $3,641,696, which represented 0.47% of KTET's average daily net 
assets, for Keystone Management's services under the Management Agreement 
after any applicable expense limitations, plus reimbursable expenses of 
$1,274,875, which represented 0.17% of KTET's average daily net assets. For 
the fiscal year ended December 31, 1994, KTFF paid Keystone Management fees 
of $5,941,545, which represented 0.43% of KTFF's average daily net assets, 
for Keystone Management's services under the Management Agreement after any 
applicable expense limitations, plus reimbursable expenses of $2,029,000, 
which represented 0.14% of KTFF's average daily net assets. 


   Keystone serves as the investment adviser to each of the Funds. As 
compensation for its investment advisory and other services in respect of 
each Fund, Keystone receives a fee which is 85% of the management fee 
received by Keystone Management under the Management Agreements. For the 
fiscal year ended November 30, 1994, the fee paid by Keystone Management to 
Keystone in respect of KTET was $3,095,441. For the fiscal year ended 
December 31, 1994, the fee paid by Keystone Management to Keystone in respect 
of KTFF was $5,050,313. 

   These investment advisory and investment management fees are separate from 
and do not include the costs of custody, transfer agency and other expenses 
paid by each Fund. See "Other Significant Fees and Expenses" below. 

Other Significant Fees and Expenses 
In addition to the investment advisory and management fees described above, 
the principal expenses of each Fund include, but are not limited to, (i) 
expenses of its transfer agent, custodian and independent auditors; (ii) 
expenses under its 12b-1 Plan; (iii) fees of its Independent Trustees; (iv) 
fees payable to government agencies; (v) expenses of preparing, printing and 
mailing Fund prospectuses, 

                                      9 
<PAGE>
 
notices, reports and proxy material; and (vi) certain extraordinary expenses. 
In addition to such expenses, each Fund pays its brokerage commissions, 
interest charges and taxes. 

   On the second page of each Fund's Prospectus is a Fee Table that 
summarizes the costs and expenses associated with an investment in the Fund. 


Expense Ratios 
For the fiscal year ended November 30, 1994, KTET paid 1.65% of its average 
daily net assets in expenses. For the fiscal year ended December 31, 1994, 
KTFF paid 1.55% of its average daily net assets in expenses. 



   At asset levels as of the close of fiscal 1994, the combination of KTET 
and KTFF would reduce KTET's and KTFF's nondistribution expenses by 
approximately 10 basis points and 2 basis points, respectively. Distribution 
expenses of the combined fund will vary in accordance with sales activity. 
See "Distribution Procedures and Payments" below. 


Purchase and Redemption Procedures, Deferred Sales Charges and Exchange 
Rights 
Shares of each Fund are sold at net asset value. There are no sales charges 
on purchases of Shares of the Funds at the time of purchase. However, with 
certain exceptions, when Shares are redeemed within four calendar years after 
their purchase, a deferred sales charge may be imposed at rates ranging from 
a maximum of 4% of amounts redeemed during the same calendar year of purchase 
to 1% of amounts redeemed during the third calendar year after the year of 
purchase. No deferred sales charge is imposed on amounts redeemed thereafter 
or on shares purchased through reinvestment of dividends and distributions. 
If imposed, the contingent deferred sales charge is deducted from the 
redemption proceeds otherwise payable to the shareholder. 

   Shares of KTET and of KTFF may be purchased in exactly the same manner. 
See "How to Buy Shares" in the accompanying KTFF Prospectus. 

   KTFF Shares received by KTET shareholders as a result of the 
Reorganization will not be subject to a deferred sales charge. 


   No deferred sales charge will be imposed on KTFF Shares issued pursuant to 
the Reorganization that replace KTET Shares. For purposes of any future 
contingent deferred sales charge on KTFF Shares issued pursuant to the 
Reorganization, the calendar year of the purchase of those KTFF Shares will 
be assumed to be the year the KTFF Shares issued pursuant to the 
Reorganization were originally purchased. Redemptions for both Funds may be 
made by submitting a redemption request to KIRC or the shareholder's 
broker-dealer. See "How to Redeem Shares" in the accompanying KTFF 
Prospectus. 


   KTET Shares and KTFF Shares have the same exchange rights. Such Shares may 
be exchanged for Shares of any of the other twelve funds in the Keystone 

                                      10 
<PAGE>
 
Fund Family, on the basis of their respective net asset values. See 
"Shareholder Services" in the accompanying KTFF Prospectus. 


Distribution Procedures and Payments 
KTET and KTFF have adopted substantially similar 12b-1 Plans, pursuant to 
which they incur certain distribution related expenses. Each Fund's 
Distribution Plan provides that the Fund may expend up to 0.3125% quarterly 
(approximately 1.25% annually) of the average daily net asset value of its 
shares to pay distribution costs for sales of its shares and to pay 
shareholder service fees. A NASD rule limits such annual expenditures to 1%, 
of which 0.75% may be used to pay such distribution costs and 0.25% may be 
used to pay shareholder service fees. The aggregate amount that each Fund may 
pay for such distribution costs is limited to 6.25% of gross share sales 
since the inception of the Fund's Distribution Plan plus interest at the 
prime rate plus 1% on unpaid amounts thereof (less any contingent deferred 
sales charges paid by shareholders to the Principal Underwriter). 


   Payments under each Fund's Distribution Plan are currently made to the 
Principal Underwriter, (which may reallow all or part to others, such as 
dealers), (1) as commissions for Fund shares sold, and (2) as shareholder 
service fees in respect of shares maintained by the recipients outstanding on 
each of the Fund's books for specified periods. Amounts paid or accrued to 
the Principal Underwriter under (1) and (2) in the aggregate may not exceed 
the quarterly limitation referred to above. The Principal Underwriter 
generally allows to brokers or others a commission equal to 3% of the price 
paid to each Fund for each sale of Fund shares as well as a shareholder 
service fee at a rate of 0.25% per annum of the net asset value of shares 
sold by such brokers or others and remaining outstanding on the books of the 
Fund for specified periods. 

   After the Reorganization, it is anticipated that the commission that the 
Principal Underwriter will pay brokers or others for Fund share sales will be 
equal to 4% of the price paid to the Fund for each sale of Fund shares. The 
shareholder service fee will remain the same. 

Dividends and Distributions 
Each shareholder of KTET who becomes a shareholder of KTFF will be entitled 
to dividends and distributions of KTFF. Each Fund (i) declares dividends from 
net investment income daily and distributes to its shareholders such 
dividends monthly, and (ii) declares and distributes all net realized 
long-term capital gains annually. 

   Distributions are payable in shares of the relevant Fund, or, at the 
shareholder's option (which must be exercised before the record date for the 
distribution) in cash. Fund distributions in the form of additional shares 
are made at net asset value without the imposition of a sales charge. Unless 
a KTET shareholder instructs or has instructed otherwise, any distributions 
paid after the Effective Date on the KTFF Shares he receives in the 
Reorganization will be made in the same 

                                      11 
<PAGE>
 
manner that the shareholder receives dividends and distributions on his KTET 
Shares. After the Reorganization, shareholders may elect, at any time, to 
change the manner in which their dividends and distributions are paid. See 
"Dividends and Taxes" in the accompanying KTFF Prospectus. 

Tax Consequences 
In the opinion of Sullivan & Worcester, legal counsel to KTET, the 
Reorganization will constitute a tax free reorganization pursuant to Section 
368(a)(1)(C) of the Internal Revenue Code of 1986, as amended (the "Internal 
Revenue Code"). No gain or loss will be recognized by KTET or its 
shareholders as a result of the Reorganization. The tax basis and holding 
period of the KTFF Shares received by KTET shareholders will be the same as 
the tax basis and holding period of the KTET Shares surrendered therefor. In 
addition, the tax basis and holding period of the assets of KTET in the hands 
of KTFF will be the same as the tax basis and holding period of such assets 
in the hands of KTET prior to the Reorganization. See "The 
Reorganization--Federal Income Tax Consequences." 

                            PRINCIPAL RISK FACTORS 

As discussed above in the synopsis, the investment objectives, policies and 
strategies of KTET and KTFF do not differ materially. Accordingly, the 
investment risks for both Funds are substantially the same. The principal 
risk factor of investing in either KTET or KTFF is that the net asset value 
upon which the value of Shares is based will fluctuate in response to changes 
in economic conditions, interest rates and the market's perception of the 
underlying portfolio securities of the Fund. Specifically, the market value 
of fixed income securities may vary inversely to changes in prevailing 
interest rates. In addition, the ability of each Fund to achieve its 
investment objective is dependent upon the continuing ability of issuers of 
municipal bonds held in the Fund's portfolio to meet their continuing 
obligation to pay interest and principal when due. Furthermore, from time to 
time, proposals have been introduced before Congress for the purpose of 
restricting or eliminating the federal income tax exemption for interest on 
municipal bonds. Similar proposals may be introduced in the future, which if 
enacted could materially affect the availability of municipal bonds for 
investment by the Funds and the value of each Fund's portfolio. 

Both Funds invest in securities with similar maturities, and both Funds use 
substantially identical procedures for the valuation of portfolio securities. 
Both Funds may enter into repurchase agreements and reverse repurchase 
agreements, firm commitment agreements for securities and currencies, options 
transactions, currency and other financial futures contracts and related 
options transactions for hedging purposes, and, in furtherance of their 
investment objectives, certain other types of derivative instruments, 
including structured securities. Both Funds may also invest in obligations 
denominated in foreign currencies which are exempt from federal income tax. 
Each of these investment techniques involve certain 

                                      12 
<PAGE>
 
investment risks. Each Fund's Prospectus contains a discussion of the Fund's 
investment risks in the section entitled "Risk Factors." See also the 
"Additional Investment Information" section at the back of the KTFF 
Prospectus. 

                              THE REORGANIZATION 

Reasons for the Proposed Transaction 
The Board of Trustees of KTET, including all of the Fund's Independent 
Trustees, has determined that the tax-free Reorganization would be in the 
best interests of the Fund, would not dilute the interests of the Fund's 
shareholders, and would not impose an unfair burden on the Fund. 

   The Board of Trustees has proposed the transaction in the interest of 
providing a cost effective investment alternative for KTET shareholders. As 
KTFF shareholders, KTET shareholders can continue to pursue the highest 
possible current income, exempt from federal income taxes, while preserving 
capital. Continuity of investment management as well as all other investor 
services (including exchange privileges with the other funds in the Keystone 
Fund Family) currently provided to KTET will be maintained. 

   The combination of the two Funds should permit KTET shareholders, as 
shareholders of KTFF, to pursue the same investment objective in a larger 
fund with the following resulting advantages (although no assurance can be 
given that these benefits will be obtained): 

   1. Economies of scale--The proposed reorganization is expected to reduce 
operating expenses for KTET. Investment management and custodial fees are 
reduced as the asset base reaches certain levels, thus decreasing as assets 
increase. Fixed expenses such as accounting, legal and printing costs will be 
spread over a larger asset base resulting in per share expense reductions or 
economies of scale. 


   As of October 16, 1995, KTET's net assets were approximately $685 Million 
and KTFF's net assets were approximately $1.2 billion. 


   2. Increased investment opportunities--It is expected that the combined 
Fund will be more easily and efficiently managed. A larger single asset base 
reduces transaction costs, might result in reduced portfolio turnover and 
provides the opportunity to obtain a wider variety of investments. 

   3. Facilitate marketing and distribution efforts--It is expected that the 
combined Fund will facilitate marketing and distribution efforts with a view 
toward increasing the asset base which in turn will benefit shareholders as 
described in (1) and (2) above. 

   The Board of Trustees of KTET based their decision to recommend the 
Reorganization on a number of factors, including the following: 

   1. projected expense ratios and information regarding fees and expenses of 
KTET and KTFF; 

                                      13 
<PAGE>
 
   2. the terms and conditions of the Reorganization and whether it would 
result in dilution of the interests of KTET shareholders; 

   3. the compatibility of KTET, its investment objective, policies and 
restrictions with those of KTFF; 

   4. the costs to KTET of the Reorganization; 

   5. the tax consequences to KTET and its shareholders resulting from the 
Reorganization; 

   6. the availability to KTFF shareholders of shareholder services identical 
to those available to KTET shareholders; and 

   7. the possible investment benefits to be gained from a single larger 
fund. 

Agreement on Transfer of Assets 
The terms and conditions under which the Reorganization may be consummated 
are set forth in the Reorganization Agreement. Significant provisions of the 
Reorganization Agreement are summarized below. This summary, however, is 
qualified in its entirety by reference to the Reorganization Agreement, a 
copy of which is attached hereto as Exhibit A. 

   The Reorganization Agreement provides that all of the assets of KTET will 
be transferred to KTFF in exchange for Shares of KTFF and the liabilities of 
KTET will be assumed by KTFF on the Effective Date (the later of (i) receipt 
of all necessary regulatory approvals, (ii) final adjournment of the meeting 
of the shareholders of KTET at which the Reorganization Agreement will be 
considered so long as the Reorganization Agreement is approved by the 
shareholders, or (iii) such later date as the parties to the Reorganization 
Agreement may mutually agree upon). 

   The number of full and fractional KTFF Shares to be delivered to KTET 
shareholders will be determined on the basis of the relative net asset values 
of KTFF and KTET as of the close of business on the New York Stock Exchange 
on the Effective Date. The net asset value of a KTFF Share will be determined 
in the manner set forth in KTFF's Prospectus, a copy of which accompanies 
this Prospectus/Proxy Statement, except that such computation will be made to 
the nearest thousandth of a cent. The valuation practices of KTFF are 
described under "Pricing Shares" in KTFF's Prospectus. The assets and 
liabilities of KTET will be valued in the same manner as that used with 
respect to the valuation of the assets and liabilities of KTFF. The valuation 
procedures of both Funds are substantially identical. The value of the Shares 
of KTET will be computed to the nearest thousandth of a cent. 

   Under the Reorganization Agreement, (i) all of the assets and liabilities 
of KTET will be exchanged for Shares of KTFF; (ii) KTFF Shares will be 
distributed to the shareholders of KTET as of the close of business on the 
Effective Date; and 

                                      14 
<PAGE>
 
(iii) KTET will be liquidated. The distribution of KTFF Shares will be 
accomplished by the establishment of open accounts on the records of KTFF in 
the name of each shareholder of KTET representing the respective pro rata 
number of Shares of KTFF due such shareholder. Fractional Shares of KTFF will 
be carried to the third decimal place. After the Effective Date, KTFF Share 
certificates will be issued only upon written request, and such requests must 
be accompanied by any Share certificates issued for KTET Shares held by the 
investor. 

   The Board of Trustees of KTET, including all of the Independent Trustees, 
has determined that the interests of the existing shareholders of KTET will 
not be diluted as a result of the Reorganization, and that the Reorganization 
is in the best interests of KTET shareholders. The Board of Trustees of KTFF, 
including all of the Independent Trustees, has made the same determinations 
with respect to the interests of the existing shareholders of KTFF. 

   The consummation of the Reorganization is subject to a number of 
conditions set forth in the Reorganization Agreement. The Reorganization 
Agreement may be terminated and the Reorganization abandoned at any time, 
before or after approval by the shareholders of KTET, prior to the Effective 
Date by either KTET or KTFF. 

   KTFF will pay the expenses (consisting primarily of legal, accounting, 
custodian and transfer agents fees, as well as printing and mailing and other 
expenses in connection with the registration of KTFF Shares under the 1933 
Act) incurred by it in connection with the Reorganization. KTET will pay the 
expenses of printing and mailing this Prospectus/Proxy Statement and other 
material to KTET shareholders and conducting proxy solicitations. 

Description of the Securities to be Issued 
KTFF is an open-end, diversified management investment company, organized as 
a Massachusetts business trust. KTFF currently issues one class of shares, 
which participate equally in dividends and distributions and have equal 
voting, liquidation and other rights, including rights of appraisal. When 
issued and paid for, the shares will be fully paid and nonassessable by the 
Fund. After the Reorganization, KTFF will publicly offer and issue this 
class. KTFF Shares may be exchanged for Shares of any of the other twelve 
funds in the Keystone Fund Family, but will have no other preference, 
conversion, exchange or preemptive rights. Shares are redeemable, 
transferable and freely assignable as collateral. There are no sinking fund 
provisions. 

   Under Massachusetts law, the Fund is not required to hold annual meetings. 
The Fund will hold special meetings from time to time as required under its 
Declaration of Trust, By-Laws and the 1940 Act. A special meeting of 
shareholders will be held when 10% of the outstanding shares request a 
meeting for the purpose of removing a Trustee. 

   Under Massachusetts law it is possible that a Fund shareholder may be held 
personally liable for the Fund's obligations. The Fund's Declaration of Trust 
pro 

                                      15 
<PAGE>
 
vides, however, that shareholders shall not be subject to any personal 
liability for the Fund's obligations and provides indemnification from Fund 
assets for any shareholder held personally liable for the Fund's obligations. 
Disclaimers of such liability are included in each Fund agreement. 

   Important financial information relating to KTFF is contained in KTFF's 
Financial Highlights, attached hereto as Exhibit B. Important information 
about KTFF is also contained in Management's Discussion of KTFF's 
Performance, attached hereto as Exhibit C. This financial information appears 
in KTFF's most recent Annual Report. 

Federal Income Tax Consequences 
The completion of the Reorganization is contingent upon the receipt by KTET 
of an opinion from Sullivan & Worcester that, on the basis of the existing 
provisions of the Internal Revenue Code, Treasury regulations, current 
administrative rules, and court decisions, for federal income tax purposes: 
(i) no gain or loss will be recognized by KTET or KTFF as a result of the 
Reorganization; (ii) the basis of the assets of KTET in the hands of KTFF 
will be the same as the basis of those assets in the hands of KTET 
immediately prior to the Reorganization; (iii) the holding period of KTET's 
assets in the hands of KTFF will include the period during which the assets 
were held by KTET; (iv) no gain or loss will be recognized by shareholders of 
KTET as a result of the Reorganization; (v) the basis of KTFF Shares received 
by KTET shareholders will be the same as the basis of KTET Shares surrendered 
therefor; and (vi) the holding period of KTFF Shares received by KTET 
shareholders will include the holding period during which KTET Shares 
surrendered in exchange therefor were held, provided that such Shares were 
held as a capital asset in the hands of KTET shareholders on the date of the 
Reorganization. 


   As of October 16, 1995, KTET had available, for federal income tax 
purposes, unused capital loss carryforwards of $15,117,214 expiring in 2002. 
As a result of the Reorganization, the unused capital loss carryforwards will 
become tax attributes of KTFF, and the utilization of the carryforwards will 
benefit all the shareholders of KTFF. If the Reorganization is consummated, 
KTFF will be constrained, however, in the extent to which it can use the 
capital loss carryforwards of KTET because of limitations imposed by the 
Internal Revenue Code upon the occurrence of an "ownership change". KTFF 
should be able to use in each year from 1996 through 2002, capital loss 
carryforwards in an amount equal to the value of KTET on the date of the 
Reorganization multiplied by a long-term tax-exempt rate calculated by the 
Internal Revenue Service (currently about 6%). If the amount of such losses 
is not used in one year, it may be added to the amount available for use in 
the next year. 


   KTET shareholders should consult their tax advisers regarding the effect, 
if any, of the proposed Reorganization in light of their individual 
circumstances. Since the foregoing discussion relates only to the federal 
income tax consequences of the Reorganization, shareholders of KTET should 
also consult their tax advisers as to the state and local tax consequences, 
if any, of the Reorganization. 

                                      16 
<PAGE>
 

Capitalization 
The following table shows the capitalization of KTFF and KTET as of October 
24, 1995 and on a pro forma basis as of that date after giving effect to the 
proposed acquisition of assets of KTET at the then net asset value per Share: 



<TABLE>
<CAPTION>
                                                         Pro Forma 
                          KTFF             KTET           Combined 
                       -------------    ------------   -------------- 
<S>                    <C>              <C>             <C>
Total Net Assets       $1,195,551,085   $680,003,189     $1,875,554,273 
Net Asset Value 
  per Share            $7.68            $10.69           $7.68 
Total Shares                                              
  Outstanding          $155,717,807.854  $63,593,569.799 $244,260,216.167
</TABLE>

                         INFORMATION ABOUT THE FUNDS 


KEYSTONE TAX FREE FUND 
Information about KTFF is included in its Prospectus dated April 28, 1995, 
which is incorporated by reference herein and a copy of which accompanies 
this Prospectus/Proxy Statement. Information about KTFF is also included in 
its most recent Annual Report and Semi-Annual Report, each of which is 
incorporated by reference herein. Additional information about KTFF is 
included in its SAI dated April 28, 1995, and in the SAI dated December 20, 
1995, relating to the Reorganization, each of which is incorporated by 
reference herein. Copies of KTFF's SAIs and Annual and Semi-Annual Reports 
may be obtained without charge by writing to KTFF at the address listed at 
the front of this Prospectus/Proxy Statement or by calling KTFF at (800) 
343-2898 or (617) 621-6100. 


KEYSTONE TAX EXEMPT TRUST 
Information about KTET is included in its Prospectus and SAI each dated March 
31, 1995, each of which is incorporated by reference herein. Copies of KTET's 
Prospectus and SAI may be obtained without charge by writing to KTET at the 
address listed at the front of this Prospectus/Proxy Statement or by calling 
KTET at (800) 343-2898 or (617) 621-6100. 

                    ADDITIONAL INFORMATION ABOUT THE FUNDS 

Both KTFF and KTET are subject to the informational requirements of the 1934 
Act and the 1940 Act, and, in accordance therewith, file reports, proxy 
material and other information with the Commission. 

Such reports, proxy material and other information can be inspected and 
copied at the Public Reference Facilities maintained by the Commission at 450 
Fifth Street, N.W., Washington, D.C. 20549. Copies of such material can also 
be obtained from the Public Reference Branch, Office of Consumer Affairs and 
Information Services, Securities and Exchange Commission, Washington, D.C. 
20549 at prescribed rates. 

                                      17 
<PAGE>
 
Supplementary Solicitation 
Supplementary solicitation will generally be made by mail, telephone, 
facsimile, telegram or in person by officers of KTFF and KTET and by officers 
or employees of KIRC, Keystone, Keystone Investments, the Principal 
Underwriter or any of their subsidiaries. 

   The Fund may also arrange to have votes recorded by telephone. The 
telephone voting procedure is designated to authenticate shareholders' 
identities, to allow shareholders to authorize the voting of their shares in 
accordance with their instructions and to confirm that their instructions 
have been properly recorded. The Fund has been advised by counsel that these 
procedures are consistent with the requirements of applicable law. If these 
procedures were subject to a successful legal challenge, such votes would not 
be counted at the meeting. The Fund is unaware of any such challenge at this 
time. Shareholders voting by telephone will be called at the phone numbers 
KIRC has in its records for accounts, will be asked to verify certain 
criteria specific to their accounts intended to ensure the identity of the 
shareholder, and will be given an opportunity to authorize proxies to vote 
their shares at the meeting in accordance with their instructions. To ensure 
that shareholders' instructions have been recorded correctly, shareholders 
will receive a confirmation of their instructions in the mail. A toll-free 
number will be available in case the information contained in the 
confirmation is incorrect. Although shareholders' votes may be taken by 
telephone, each shareholder will receive a copy of this Prospectus/Proxy 
Statement and may vote by mail using the enclosed proxy card. 


Substantial Shareholders 
As of October 31, 1995, to the best knowledge of KTFF, the following 
shareholder owned of record 5% or more of the outstanding Shares of KTFF: 



<TABLE>
<CAPTION>
                                          Percentage 
Shareholder                               Interest 
- ----------------------------------    ------------------ 
<S>                                   <C>
Merrill Lynch Pierce Fenner & 
  Smith                                     17.249% 
Attn: Book Entry 
  4800 Deer Lake Dr. E, 3rd FL 
  Jacksonville, FL 32246-6484 
</TABLE>

   On that date, the Trustees and officers of KTFF, as a group, beneficially 
owned less than 1% of the outstanding Shares of KTFF. 


   As of October 31, 1995, to the best knowledge of KTET, the following 
shareholders owned of record 5% or more of the outstanding Shares of KTET. 



<TABLE>
<CAPTION>
                                          Percentage 
Shareholder                               Interest 
- ----------------------------------    ------------------ 
<S>                                   <C>
Merrill Lynch Pierce Fenner & 
  Smith                                     8.509% 
Attn: Book Entry 
  4800 Deer Lake Dr. E, 3rd FL 
  Jacksonville, FL 32246-6484 
</TABLE>

                                      18 
<PAGE>
 
On that date, the Trustees and officers of KTET, as a group, beneficially 
owned less than 1% of the outstanding Shares of KTET. 

Interest of Certain Persons 
The following entities receive payments from KTFF for services rendered 
pursuant to contractual arrangements with KTFF: Keystone Management, as 
investment manager, receives payments for its investment management services, 
as described in the section above entitled "Investment Advisory and 
Management Fees"; Keystone, as investment adviser, receives payments for its 
investment advisory services, also as described in the section above entitled 
"Investment Advisory and Management Fees"; the Principal Underwriter receives 
payments pursuant to the 12b-1 Plan described in the section above entitled 
"Distribution Procedures and Payments" as well as certain payments in respect 
of contingent deferred sales charges; and KIRC is compensated for acting as 
the transfer and dividend disbursing agent. 


                                                               January 2, 1996 



                                      19 
<PAGE>
 
EXHIBIT A 

                     AGREEMENT AND PLAN OF REORGANIZATION 


   This Agreement and Plan of Reorganization (the "Agreement") is entered 
into as of October 16, 1995, by and between Keystone Tax Free Fund ("KTFF"), 
a Massachusetts business trust, and Keystone Tax Exempt Trust ("KTET"), a 
Massachusetts business trust (each, a "Fund," and together, the "Funds"), 
each Fund having its principal place of business at 200 Berkeley Street, 
Boston, Massachusetts 02116. 



                                 WITNESSETH: 

Whereas, each of KTFF and KTET is a diversified, open-end management company 
registered under the Investment Company Act of 1940 (the "1940 Act") and 
issues shares of beneficial interest; 

Whereas, KTFF and KTET have agreed, subject to the receipt of the approvals 
described in Section 3 below, to transfer all of the assets of KTET to KTFF 
in exchange for shares of KTFF with KTFF assuming the liabilities of KTET to 
the extent provided herein; 

Whereas, following the reorganization, shares of KTFF will be distributed to 
the shareholders of KTET in liquidation of KTET, and KTET will be terminated; 

Whereas, the reorganization described in this Agreement is intended to be a 
reorganization within the meaning of Section 368 (a)(1)(C) of the Internal 
Revenue Code of 1986, as amended (the "Code"); and 

Whereas, the respective Boards of Trustees of KTET and KTFF, including each 
Fund's Independent Trustees, have determined that participating in the 
transactions contemplated by this Agreement is in the best interests of the 
Funds; 

Now Therefore, in consideration of the premises set forth above and the 
mutual covenants and agreements set forth below, the parties hereto agree as 
follows: 

                                  SECTION 1. 
                        EXCHANGE OF ASSETS FOR SHARES 

1.1 Terms of Exchange. 

  (a) Upon the Effective Date (as defined in Subsection 1.2 below), KTET will 
sell, transfer, and deliver to KTFF good and marketable title to all of the 
then existing assets of KTET free and clear of all liens, claims, charges, 
options, and encumbrances. 

                                      A-1 
<PAGE>
 
(b) KTFF will assume and pay, to the extent that they exist on the 
Effective Date, all the liabilities of KTET, whether absolute, accrued, 
contingent, or otherwise. 

  (c) KTFF will deliver to KTET that number of full and fractional shares of 
KTFF having an aggregate net asset value equal to the aggregate net asset 
value of KTET, all determined as provided in Section 1.1(d) below. 

  (d) The following provisions shall apply to the determination of the number 
of shares of KTFF to be delivered: 

    (i) The net asset value per share of KTFF shall be determined as of the 
close of business on the New York Stock Exchange on the Effective Date. 

    (ii) The net value of the assets and liabilities of KTET shall be 
determined as of the close of business on the New York Stock Exchange on the 
Effective Date. 

    (iii) The net asset value per share of KTET shall be determined as of the 
close of business on the New York Stock Exchange on the Effective Date. 

    (iv) The net asset value of KTFF shall be computed in the manner set 
forth in KTFF's current Registration Statement under the Securities Act of 
1933 ("1933 Act") and the 1940 Act, except that such computation shall be 
made to the nearest one-hundredth of a cent. 

    (v) The assets and liabilities of KTET shall be valued in the same manner 
as that used with respect to the valuation of the assets and liabilities of 
KTFF in the computation of the net asset value per share of KTFF. 

    (vi) The net asset value per share of KTET shall be computed by dividing 
the net value of the assets and liabilities of KTET, determined as provided 
in (ii) and (v) above, by the number of shares of KTET outstanding as of the 
close of business on the New York Stock Exchange (the "Exchange") on the 
Effective Date; and such computation shall be made to the nearest 
one-hundredth of a cent. 

    (vii) The net asset value per share of KTET determined as provided in 
(vi) above shall be divided by the net asset value per share of KTFF 
determined as provided in (i) and (iv) above; and the result of such division 
shall be calculated to six decimal places (the "Conversion Ratio"). 

    (viii) The number of shares of KTET outstanding at the close of business 
on the New York Stock Exchange on the Effective Date shall be multiplied by 
the Conversion Ratio to determine the number of shares of KTFF to be 
delivered. 

                                      A-2 
<PAGE>
 
(ix) KPMG Peat Marwick LLP shall provide a written report to each of KTFF 
and KTET on procedures they will have performed to determine the accuracy of 
the computations required by this Section 1.1(d). 

1.2 Closing and Effective Date. The closing shall be held at the offices of 
Keystone Investment Management Company, investment adviser to KTFF, located 
at 200 Berkeley Street, Boston, Massachusetts 02116, and shall occur on the 
later of (a) receipt of all necessary regulatory approvals; (b) the final 
adjournment of the meeting of the shareholders of KTET at which this 
Agreement will be considered so long as this Agreement and the transaction 
set forth herein are approved by the shareholders of KTET at the meeting; or 
(c) such later date as the parties may mutually agree (the "Effective Date"). 

1.3 KTET Share Sales and Transfers. KTET shall not issue, sell, or transfer 
any of its shares after the Effective Date. 

1.4 Transfer Books; Redemptions. The stock transfer books of KTET will be 
permanently closed as of the close of business on the Effective Date and only 
redemption requests relating to KTET received in proper form on or prior to 
the close of trading on the New York Stock Exchange on the Effective Date 
shall be accepted by KTET. Redemption requests relating to KTET thereafter 
received shall be deemed to be redemption requests for shares of KTFF to be 
distributed to the shareholders of KTET under this Agreement. 

1.5 Treasury Shares. Any shares of KTET held in the treasury of KTET 
immediately prior to the Effective Date shall be cancelled upon the Effective 
Date without conversion into shares of KTFF. 

1.6 Transfer Taxes. Any transfer taxes payable upon issuance of shares of 
KTFF in a name other than the registered shareholder of KTET entitled to 
receive the same shall be paid by the person to whom such shares are to be 
issued as a condition of such transfer. 

1.7 Contingent Deferred Sales Charge. KTET imposes a deferred sales charge at 
rates ranging from a maximum of 4% of amounts redeemed during the same 
calendar year of purchase to 1% of amounts redeemed during the third calendar 
year after the year of purchase. No contingent deferred sales charge is 
imposed on amounts redeemed thereafter. If imposed, the contingent deferred 
sales charge is imposed on amounts redeemed thereafter. If imposed, the 
contingent deferred sales charge is deducted from the redemption proceeds 
otherwise payable to the shareholder. The shareholders of KTET may be subject 
to such deferred sales charge with respect to those shares of KTFF received 
by them under this Agreement in exchange for their shares of KTET if their 
shares of KTET were subject to such deferred sales charge. 

                                      A-3 
<PAGE>
 
                                   SECTION 2.
                   LIQUIDATION OF KEYSTONE TAX EXEMPT TRUST 

2.1 Plan of Liquidation. As soon as practicable after the Effective Date, 
KTET will distribute pro rata to its shareholders of record as of the close 
of business on the Effective Date, KTFF shares received by KTET pursuant to 
Section 1 above. KTFF will establish an open account on its share records in 
the name of each shareholder of KTET representing the respective number of 
shares of KTFF due such shareholder. Fractional KTFF shares will be carried 
to the third decimal place. No certificates representing KTFF shares will be 
issued. Simultaneously with such crediting of KTFF shares to the shareholders 
of record of KTET, the shares of KTET held by such shareholders shall be 
cancelled. 

2.2 Further Actions to Complete Dissolution. As soon as practicable after the 
Effective Date, KTET shall take, in accordance with its Declaration of Trust, 
Massachusetts law, and the rules and regulations of the Securities and 
Exchange Commission (the "Commission"), all such other steps as shall be 
necessary and proper to effect a complete liquidation and dissolution of 
KTET. 

                                  SECTION 3. 
                           APPROVAL OF TRANSACTIONS 

3.1 Trustees of KTFF. A duly constituted meeting of the Board of Trustees of 
KTFF was held on December 14, 1994, at which meeting this Agreement and the 
transactions set forth herein were duly approved by the Trustees of KTFF. 

3.2 Trustees of KTET. A duly constituted meeting of the Trustees of KTET was 
held on December 14, 1994, at which meeting this Agreement and the 
transactions set forth herein were duly approved by the Trustees of KTET, 
subject to the approval of the shareholders of KTET as set forth in 
Subsection 3.3 below. 

3.3 Approval by Shareholders of KTET. A meeting of the shareholders of KTET 
shall be called and held for the purpose of having the KTET shareholders act 
upon this Agreement and the transactions set forth herein. KTFF shall furnish 
to KTET such data and information relating to KTFF as shall be reasonably 
requested by the Trustees and officers of KTET for inclusion in the 
information to be furnished to the shareholders in connection with such 
meeting. 

                                  SECTION 4. 
                        REPRESENTATIONS AND WARRANTIES 
                          OF KEYSTONE TAX FREE FUND 

4.1 Organization, Existence, etc. KTFF is a business trust, duly organized, 
validly existing, and in good standing under the laws of The Commonwealth of 
Massachusetts and has the requisite power to carry on its business as it is 
now being conducted. KTFF has all necessary federal, state, and local 
authorization to own all of its properties and assets and to carry on its 
business as now being conducted. 

                                      A-4 
<PAGE>
 
4.2 Registration as Investment Company. KTFF is registered under the 1940 Act 
as an open-end, diversified investment company of the management type, and 
such registration has not been revoked or rescinded and is in full force and 
effect. 

4.3 Financial Statements. The financial statements of KTFF for the fiscal 
year ended December 31, 1994 and the fiscal period ended June 30, 1995, 
previously delivered to KTET, fairly present the financial position of KTFF 
as of December 31, 1994 and June 30, 1995, respectively, and the results of 
its operations and changes in its net assets for the year and period, 
respectively, then ended. 

4.4 Shares to be Issued. The shares of KTFF to be issued in exchange for the 
assets of KTET have been duly authorized and when delivered pursuant to this 
Agreement will be validly issued, fully paid, and nonassessable by KTFF. 

4.5 Authority Relative to this Agreement. KTFF has the power to enter into 
this Agreement and to carry out its obligations hereunder. The execution and 
delivery of this Agreement and the consummation of the transactions 
contemplated herein have been duly authorized by the Board of Trustees of 
KTFF and no other proceedings by KTFF are necessary to authorize KTFF's 
officers to effectuate this Agreement and the transactions contemplated 
herein. KTFF is not a party to, or obligated under, any charter, by-law, 
indenture, or contract provision or any other commitment or obligation or 
subject to any order or decree that would be violated by its executing and 
carrying out this Agreement. 


4.6 Liabilities. There are no liabilities of KTFF, whether or not determined 
or determinable, other than liabilities disclosed or provided for in its 
financial statements for the fiscal year ended December 31, 1994 and for the 
fiscal period ended June 30, 1995, previously delivered as set forth in 
Subsection 4.3, and liabilities incurred in the ordinary course of business 
subsequent to June 30, 1995 or otherwise previously disclosed to KTET, none 
of which has been materially adverse to the business, assets, or results of 
operations of KTFF. 


4.7 Litigation. There are no claims, actions, suits, or proceedings pending 
or, to the knowledge of KTFF, threatened that would materially adversely 
affect KTFF or its assets or business or prevent or hinder consummation of 
the transactions contemplated hereby. 

4.8 Contracts. Except for contracts and agreements previously disclosed to 
KTET, under which no default exists, KTFF is not a party to or subject to any 
material contract, debt, instrument, plan, lease, franchise, license, or 
permit of any kind or nature whatsoever. 

4.9 Taxes. The federal income tax returns of KTFF have been filed for all 
taxable years prior to and including December 31, 1994, and all taxes payable 
pursuant to such returns have been paid. KTFF has qualified as a regulated 
investment company under the Code in respect to each taxable year of KTFF 
since commencement of its operations. 

                                      A-5 
<PAGE>
 

4.10 Registration/Proxy Statement. KTFF shall file with the Commission a 
Registration/Proxy Statement (the "Registration/Proxy Statement") under the 
1933 Act relating to the shares of KTFF issuable hereunder. At the time the 
Registration/Proxy Statement becomes effective, the Registration/Proxy 
Statement (a) will comply in all material respects with the provisions of the 
1933 Act and the regulations of the Commission thereunder, and (b) will not 
contain an untrue statement of a material fact or omit to state a material 
fact required to be stated therein or necessary to make the statements 
therein not misleading. In addition, at the time the Registration/Proxy 
Statement becomes effective, at the time of the meeting of the shareholders 
of KTET referred to in Subsection 3.3, and on the Effective Date, the proxy 
statement (the "Proxy Statement"), the prospectus (the "Prospectus"), and 
statement of additional information (the "Statement of Additional 
Information") included in the Registration/Proxy Statement, as amended or 
supplemented by any amendments or supplements filed by KTFF, will not contain 
an untrue statement of a material fact or omit to state a material fact 
necessary to make the statements therein, in the light of the circumstances 
under which they were made, not misleading; provided, however, that none of 
the representations and warranties in this Subsection shall apply to 
statements in or omissions from the Registration/Proxy Statement or Proxy 
Statement, Prospectus, and Statement of Additional Information made in 
reliance upon and in conformity with information furnished by KTET for use in 
the Registration/Proxy Statement, as provided in Subsection 5.10. 


4.11 Capitalization. On September 29, 1995, 157,690,483 shares of KTFF were 
duly and validly issued and outstanding, fully-paid and non-assessable by 
KTFF. KTFF does not have any outstanding options, warrants, or other rights 
to subscribe for or purchase any of its shares nor is there outstanding any 
security convertible into any of its shares. 

4.12 Prospectus. The prospectus and statement of additional information of 
KTFF each dated April 28, 1995 ("KTFF Prospectus"), which have previously 
been furnished to KTET, did not contain as of such date and do not as of this 
date contain any untrue statement of a material fact or omit to state a 
material fact required to be stated therein or necessary to make the 
statements therein not misleading. 

                                  SECTION 5. 
                        REPRESENTATIONS AND WARRANTIES 
                         OF KEYSTONE TAX EXEMPT TRUST 

5.1 Organization, Existence etc. KTET is a business trust, duly organized, 
validly existing, and in good standing under the laws of The Commonwealth of 
Massachusetts and has the requisite power to carry on its business as it is 
now being conducted. KTET has all necessary federal, state, and local 
authorization to own all of its properties and assets and to carry on its 
business as now being conducted. 

                                      A-6 
<PAGE>
 
5.2 Registration as Investment Company. KTET is registered under the 1940 Act 
as an open-end, diversified investment company of the management type and 
such registration has not been revoked or rescinded and is in full force and 
effect. 

5.3 Financial Statements. The financial statements of KTET for the year ended 
November 30, 1994 and the fiscal period ended May 31, 1995, previously 
delivered to KTFF, fairly present the financial position of KTET as of 
November 30, 1994 and May 31, 1995, respectively, and the results of its 
operations and changes in its net assets for the year and period, 
respectively, then ended. 

5.4 Authority Relative to this Agreement. KTET has the requisite power to 
enter into this Agreement and to carry out its obligations hereunder. The 
execution and delivery of this Agreement and the consummation of the 
transactions contemplated herein have been duly authorized by the Board of 
Trustees of KTET, and, except for the requisite approval by the shareholders 
of KTET, no other proceedings on behalf of KTET are necessary to authorize 
KTET's officers to effectuate this Agreement and the transactions 
contemplated herein. KTET is not a party to or obligated under any charter, 
by-law, indenture, or contract provisions or any other commitment or 
obligation or subject to any order or decree that would be violated by its 
executing and carrying out this Agreement. 


5.5 Liabilities. There are no liabilities of KTET, whether or not determined 
or determinable, other than liabilities disclosed or provided for in the 
financial statements of KTET with respect to the year ended November 30, 1994 
and the fiscal period ended May 31, 1995, previously delivered as set forth 
in Subsection 5.3, and liabilities incurred in the ordinary course of 
business subsequent to May 31, 1995 or otherwise previously disclosed to 
KTFF, none of which has been materially adverse to the business assets or 
results of operations of KTET. 


5.6 Litigation. There are no claims, actions, suits or proceedings pending 
or, to the knowledge of KTET, threatened that would materially adversely 
affect KTET or its assets or business or prevent or hinder consummation of 
the transactions contemplated hereby. 

5.7 Contracts. Except for contracts and agreements previously disclosed to 
KTFF, under which no default exists (all of which will be terminated as of 
the Effective Date), KTET is not a party to or subject to any material 
contract, debt, instrument, plan, lease, franchise, license, or permit of any 
kind or nature whatsoever. 

5.8 Portfolio Securities. All securities and other assets held as investments 
by KTET as of the Effective Date will be owned by KTET free and clear of any 
liens, claims, charges, options, and encumbrances, except as otherwise 
indicated in a schedule to be delivered to KTFF prior to the Effective Date. 
The assets of KTET do not include any assets not permitted under the KTET 
Prospectus (as hereinafter defined). Except as disclosed to KTFF prior to the 
Effective Date, none 

                                      A-7 
<PAGE>
 
of such securities or other assets is, or, after the completion of the 
transactions contemplated by this Agreement, will be subject to any 
restrictions, legal or contractual, on the disposition thereof (including 
restrictions as to the public offering or sale thereof under the 1933 Act), 
and all such securities and other assets are or will be readily marketable. 

5.9 Taxes. The federal income tax returns of KTET have been filed for all 
taxable years prior to and including November 30, 1994, and all taxes payable 
pursuant to such returns have been paid. KTET has qualified as a regulated 
investment company under the Code in respect to each taxable year of KTET 
since commencement of its operations. 

5.10 Registration/Proxy Statement. In connection with the Registration/ Proxy 
Statement, KTET will cooperate with KTFF in the preparation of the proxy 
statement portion of the Registration/Proxy Statement, and will furnish to 
KTFF the information relating to KTET required by the 1933 Act and the 
regulations thereunder to be set forth in the Registration/Proxy Statement 
(including the Proxy Statement, Prospectus, and Statement of Additional 
Information). At the time the Registration/Proxy Statement becomes effective, 
the Registration/ Proxy Statement, insofar as it relates to KTET (a) will 
comply in all material respects with the provisions of the 1933 Act and the 
regulations thereunder, and (b) will not contain an untrue statement of a 
material fact or omit to state a material fact required to be stated therein 
or necessary to make the statements therein not misleading. In addition, at 
the time the Registration/Proxy Statement becomes effective, at the time of 
the meeting of the shareholders of KTET referred to in Subsection 3.3, and on 
the Effective Date, the Proxy Statement, the Prospectus, and Statement of 
Additional Information, as amended or supplemented by any amendments or 
supplements filed by KTFF insofar as they relate to KTET, will not contain an 
untrue statement of a material fact or omit to state a material fact 
necessary to make the statements therein, in the light of the circumstances 
under which they were made, not misleading. 

5.11 Capitalization. On September 29, 1995, 64,028,095 shares of KTET were 
duly and validly issued and outstanding, fully-paid, and non-assessable by 
KTET. KTET does not have any outstanding options, warrants, or other rights 
to subscribe for or purchase any shares of KTET, nor is there outstanding any 
security convertible into any shares of KTET. 

5.12 Prospectus. The prospectus and statement of additional information of 
KTET each dated March 31, 1995 ("KTET Prospectus"), which have previously 
been furnished to KTFF, did not contain as of such date and do not as of this 
date contain any untrue statement of a material fact or omit to state a 
material fact required to be stated therein or necessary to make the 
statements therein not misleading. 

                                      A-8 
<PAGE>
 
                                   SECTION 6.
                          CONDITIONS TO OBLIGATIONS 
                         OF KEYSTONE TAX EXEMPT TRUST 

The obligations of KTET hereunder with respect to the consummation of the 
exchange of assets of KTET for shares of KTFF are subject to the satisfaction 
of the conditions set forth below in this Section. 

6.1 Shareholder Approval. This Agreement and the transactions set forth 
herein with respect to KTET shall have been approved by the affirmative vote 
of the holders of a majority (as defined in the 1940 Act) of the outstanding 
voting shares of KTET. 


6.2 Representations, Warranties and Agreements. KTFF shall have complied with 
each of its agreements contained herein, each of the representations and 
warranties of KTFF contained herein shall be true in all material respects as 
of the Effective Date, and, except as otherwise indicated in any financial 
statements of KTFF audited or certified by the Treasurer of KTFF, which may 
be delivered to KTET on or prior to the last business day preceding the 
Effective Date, as of the Effective Date, there shall have been no material 
adverse change in the financial condition, results of operations, business, 
properties or assets of KTFF since June 30, 1995. KTET shall have received a 
certificate of the President of KTFF satisfactory in form and substance to 
KTET so stating; provided, however, that a decline in net asset value shall 
not constitute a material adverse change. 


6.3 Regulatory Approval. The Registration/Proxy Statement shall have been 
declared effective by the Commission and no stop order under the 1933 Act 
pertaining thereto shall have been issued, and all approvals, registrations, 
and exemptions under federal and state laws considered to be necessary shall 
have been obtained. 

6.4 Dividends. KTFF will declare to its shareholders of record on or prior to 
the Effective Date a dividend or dividends, which, together with all previous 
such dividends, shall have the effect of distributing to such shareholders as 
of the Effective Date, that portion of KTFF's investment company taxable 
income (computed without regard to any deduction for dividends paid) and that 
portion of KTFF's net realized capital gains which would have the effect of 
materially diluting the value of shares held by shareholders of either fund. 

6.5 Opinion of Counsel. KTET shall have received the opinion of Rosemary D. 
Van Antwerp, General Counsel of Keystone Custodian Funds, Inc., dated the 
Effective Date, addressed to and in form and substance satisfactory to KTET, 
to the effect that (a) KTFF is a business trust duly organized and existing 
and in good standing under the laws of The Commonwealth of Massachusetts; (b) 
KTFF is an open-end, diversified investment company of the management type 
registered under the 1940 Act; (c) this Agreement, the transactions provided 
for herein and the execution of this Agreement have been duly authorized and 
approved by all 

                                      A-9 
<PAGE>
 
requisite action of KTFF, and this Agreement has been duly executed and 
delivered by KTFF and is a valid and binding obligation of KTFF; (d) the 
Registration/Proxy Statement has been declared effective by the Commission 
and no stop order under the 1933 Act pertaining thereto has been issued, and 
all approvals, registrations and exemptions under federal and state laws 
considered to be necessary shall have been obtained; and (e) the shares of 
KTFF to be issued in exchange for the assets of KTET shall have been duly 
authorized and upon issuance thereof in accordance with this Agreement will 
be validly issued, fully paid and nonassessable. 

6.6(a) Secretary's Certificate. KTET shall have received copies of the 
resolutions adopted by the Board of Trustees of KTFF authorizing the 
execution of this Agreement by KTFF and the transactions contemplated hereby, 
certified by the Secretary or an Assistant Secretary of KTFF. 

  (b) KTET shall have received a certificate of the Secretary or an Assistant 
Secretary of KTFF as to the signatures and incumbency of its officers who 
executed this Agreement on behalf of KTFF and any other documents delivered 
in connection with the transactions contemplated hereby on behalf of KTFF. 

6.7 Treasurer's Certificate. KTFF shall have furnished to KTET a statement of 
KTFF's assets and liabilities with values determined as provided in Section 
1.1(d) of this Agreement, together with a list of the respective tax cost of 
the assets certified by KTFF's Treasurer. 

6.8(a) Officer's Certificate. KTET shall have received a certificate of an 
appropriate officer of KTFF as to the fulfillment of all agreements and 
conditions on its part to be fulfilled hereunder on or prior to the Effective 
Date, and to the effect that the representations and warranties of KTFF are 
true and correct in all material respects at and as of the Effective Date as 
if made at and as of such date. 


  (b) KTET shall have received a certificate of an appropriate officer of 
KTFF that (i) material relating to KTFF included in the Proxy Statement and 
in the KTFF Prospectus that accompanied such Proxy Statement, taken together, 
is complete and correct and contained, as of the date of the Proxy Statement 
and as of the Effective Date, no untrue statement of a material fact and 
omitted no statement of a material fact required to be stated therein or 
necessary to make the statements contained therein not misleading; (ii) the 
Registration/Proxy Statement insofar as it relates to KTFF complied otherwise 
with the regulations of the Commission applicable to the solicitation of 
proxies by registered investment companies; and (iii) KTFF's Prospectus and 
Statement of Additional Information dated April 28, 1995 complied with the 
requirements of the 1933 Act and the rules and regulations of the Commission 
thereunder. 


6.9 Opinion of Tax Counsel. KTET shall have received an opinion of Sullivan & 
Worcester that for federal income tax purposes (a) no gain or loss will 

                                      A-10 
<PAGE>
 
be recognized by KTET or KTFF upon receipt by KTFF of the assets transferred 
pursuant to this Agreement; (b) the basis to KTFF of the assets will be the 
same as the basis of the assets in the hands of KTET immediately before the 
exchange; and (c) KTFF's holding periods with respect to the assets will 
include the respective periods for which the assets were held by KTET. 

6.10 KPMG Peat Marwick LLP Letter. KTET shall have received a letter of KPMG 
Peat Marwick LLP reporting on procedures performed by them to determine the 
accuracy of the computations required by Section 1.1(d) above. 

                                  SECTION 7. 
             CONDITIONS TO OBLIGATIONS OF KEYSTONE TAX FREE FUND. 

The obligations of KTFF hereunder with respect to the consummation of the 
exchange of its shares for the assets and liabilities of KTET are subject to 
the satisfaction of the conditions set forth below in this Section. 

7.1 Shareholder Approval. This Agreement and the transactions set forth 
herein with respect to KTET shall have been approved by the affirmative vote 
of the holders of a majority (as defined in the Act) of the outstanding 
voting shares of KTET. 


7.2 Representations, Warranties and Agreements. KTET shall have complied with 
each of its agreements contained herein, each of the representations and 
warranties of KTET contained herein shall be true in all material respects as 
of the Effective Date, and, except as otherwise indicated in any financial 
statements of KTET audited or certified by the Treasurer of KTET, which may 
be delivered to KTET on or prior to the last business day preceding the 
Effective Date, as of the Effective Date, there shall have been no material 
adverse change in the financial condition, results of operations, business, 
properties, or assets of KTET since May 31, 1995. KTFF shall have received a 
certificate of the President of KTET satisfactory in form and substance to 
KTFF so stating; provided, however, that a decline in net asset value shall 
not constitute a material adverse change. 


7.3 Regulatory Approval. The Registration/Proxy Statement shall have been 
declared effective by the Commission and no stop order under the 1933 Act 
pertaining thereto shall have been issued, and all approvals, registrations, 
and exemptions under federal and state laws considered to be necessary shall 
have been obtained. 

7.4 Dividends. KTET will declare to its shareholders of record on or prior to 
the Effective Date a dividend or dividends, which, together with all previous 
such dividends, shall have the effect of distributing to such shareholders, 
as of the Effective Date, that portion of KTET's investment company taxable 
income (computed without regard to any deduction for dividends paid) and that 
portion of KTET's net realized capital gains which would have the effect of 
materially diluting the value of shares held by shareholders of either Fund. 

                                      A-11 
<PAGE>
 
7.5 Opinion of Counsel. KTFF shall have received the opinion of Rosemary D. 
Van Antwerp, General Counsel of Keystone Custodian Funds, Inc., dated the 
Effective Date, addressed to and in form and substance satisfactory to KTFF, 
to the effect that (a) KTET is a business trust duly organized and existing 
and in good standing under the laws of The Commonwealth of Massachusetts; (b) 
KTET is an open-end diversified investment company of the management type 
registered under the 1940 Act; (c) all approvals, registrations and 
exemptions under federal and state laws considered to be necessary have been 
obtained; and (d) this Agreement, the transactions provided for herein and 
the execution of this Agreement have been duly authorized and approved by all 
requisite action of KTET, and this Agreement has been duly executed and 
delivered by KTET and is a valid and binding obligation of KTET. 

7.6(a) Secretary's Certificate. KTFF shall have received copies of the 
resolutions adopted by the Board of Trustees of KTET and its shareholders 
authorizing the execution of this Agreement on behalf of KTET and the 
transactions contemplated hereby, each certified by the Secretary or an 
Assistant Secretary of KTET. 

  (b) KTFF shall have received a certificate of the Secretary or an Assistant 
Secretary of KTET as to the signatures and incumbency of its officers who 
executed this Agreement on behalf of KTET and any other documents delivered 
in connection with the transactions contemplated thereby on behalf of KTET. 

7.7 Treasurer's Certificate. KTET shall have furnished to KTFF a statement of 
KTET's assets and liabilities with values determined as provided in Section 
1.1(d) of this Agreement, together with a list of the respective tax cost of 
the assets certified by KTET's Treasurer. 

7.8(a) Officer's Certificate. KTFF shall have received a certificate of an 
appropriate officer of KTET as to the fulfillment of all agreements and 
conditions on its part to be fulfilled hereunder on or prior to the Effective 
Date, and to the effect that the representations and warranties of KTET are 
true and correct in all material respects at and as of the Effective Date as 
if made at and as of such date. 

  (b) KTFF shall have received such other documents, including an opinion of 
Rosemary D. Van Antwerp, General Counsel to Keystone Custodian Funds, Inc., 
as KTFF may reasonably request to show fulfillment of the purposes and 
conditions of this Agreement. 

7.9 Opinion of Tax Counsel. KTFF shall have received an opinion of Sullivan & 
Worcester that for federal income tax purposes (a) no gain or loss will be 
recognized by KTET or KTFF upon receipt by KTFF of the assets transferred 
pursuant to this Agreement; (b) the basis to KTFF of the assets will be the 
same as the basis of the assets in the hands of KTET immediately before the 
exchange; and (c) KTFF's holding periods with respect to the assets will 
include the respective periods for which the assets were held by KTET. 

                                      A-12 
<PAGE>
 
7.10 KPMG Peat Marwick LLP Letter. KTFF shall have received a letter of KPMG 
Peat Marwick LLP reporting on procedures performed by them to determine the 
accuracy of the computations required by Section 1.1(d) above. 

7.11 Other Acts. KTET will, from time to time, as and when requested by KTFF, 
execute and deliver or cause to be executed and delivered, all such 
assignments and other instruments, and will take and cause to be taken such 
further action, as KTFF may deem necessary or desirable in order to vest in 
and confirm to KTFF title to and possession of all the assets to be sold, 
assigned, transferred, and delivered hereunder and otherwise to carry out the 
intent and purpose of this Agreement. 

                                  SECTION 8. 
                                  AMENDMENT. 

By agreement in writing authorized by the Trustees of KTET and KTFF, the 
parties hereto may amend this Agreement at any time before or after approval 
hereof by the shareholders of KTET; provided, however, that after such 
approval by the shareholders, no amendment shall be made that substantially 
changes the terms hereof. 

                                  SECTION 9. 
                          TERMINATION OF AGREEMENT. 

This Agreement may be terminated at any time prior to the Effective Date by 
either party hereto by written notice given to the other party hereto, 
without liability on the part of either party hereto or its respective 
Trustees, officers, or shareholders. In addition, unless the term of this 
Agreement is extended by mutual consent of the parties hereto, this Agreement 
shall be terminated without liability on the part of any of the foregoing as 
of the close of business on June 30, 1996, if the Effective Date is not on or 
prior to such date. 

                                 SECTION 10. 
                  WAIVER OF REPRESENTATIONS AND CONDITIONS. 

At any time prior to the Effective Date, either of the parties may by written 
instrument signed by it (a) waive any inaccuracies in the representations and 
warranties made to it contained herein; and (b) waive compliance with any of 
the covenants or conditions made for its benefit contained herein; but after 
approval by the shareholders, no waiver shall be made that substantially 
impacts the transactions contemplated hereby. 

                                 SECTION 11. 
                                  EXPENSES. 

(a) KTFF will pay or cause to be paid all fees and expenses that it incurs in 
connection with the transaction contemplated by this Agreement, including, 
but not limited to, legal, accounting, custodian and transfer agents fees, as 
well as 

                                      A-13 
<PAGE>
 
printing, mailing and other expenses in connection with the registration of 
its shares under the 1933 Act, and additional audit fees. 

(b) KTET will pay or cause to be paid (i) all the costs of printing and 
mailing the Prospectus/Proxy Statement and other materials to KTET 
shareholders and conducting proxy solicitations; and (ii) all other fees and 
expenses that it incurs in connection with the transaction contemplated by 
this Agreement, including, but not limited to, legal, accounting, custodian 
and transfer agents fees, and additional audit fees. 

                                 SECTION 12. 
                               INDEMNIFICATION. 

(a) KTFF agrees to indemnify and hold harmless KTET, its Trustees and 
officers against any and all claims, to the extent such claims are based 
upon, arise out of or relate to any untruthful or inaccurate representation, 
any omission of a material fact necessary to make a statement not misleading 
or any breach of any warranty or any failure to perform or comply with any of 
its covenants, conditions, or agreements set forth in this Agreement and any 
obligation or liability of KTET specifically assumed by KTFF pursuant to 
Section 1.1(a); 

(b) KTET agrees to indemnify and hold harmless KTFF, its Trustees and 
officers against any and all claims, to the extent such claims are based 
upon, arise out of or relate to any untruthful or inaccurate representation, 
any omission of a material fact necessary to make a statement not misleading 
or any breach of any warranty or any failure to perform or comply with any of 
its covenants, conditions or agreements set forth in this Agreement and any 
obligation or liability of KTET (other than obligations and liabilities 
specifically assumed by KTFF pursuant to the provisions of Section 1.1(a)) 
accruing on or prior to, or existing on the Effective Date or thereafter 
accrued. 

(c) Any claim for indemnification under paragraphs (a) and (b) based upon any 
untruthful or inaccurate representation or any breach of any warranty must be 
asserted within three years from the Effective Date. As used in this section, 
the word "claim" means any and all liabilities, obligations, losses, damages, 
deficiencies, demands, claims, penalties, assessments, judgments, actions, 
proceedings, and suits of whatever kind and nature and all costs and expenses 
(including, without limitation, reasonable attorneys' fees). 

                                 SECTION 13. 
                      SURVIVAL OF REPRESENTATIONS, ETC. 

The representations, warranties, covenants, and indemnifications provided for 
in this Agreement shall survive the Effective Date. 

                                 SECTION 14. 
                                   GENERAL. 

14.1 Notices. All notices required or permitted hereunder shall be in writing 
and shall be deemed to have been delivered when deposited in the United 
States 

                                      A-14 
<PAGE>
 
mail, postage pre-paid, registered or certified mail, return receipt 
requested addressed to the parties as set forth below: 
<TABLE>
<CAPTION>
<S>                 <C>
To KTET:            Albert H. Elfner, III 
                    Chairman, President and Chief Executive 
                    Officer 
                    c/o Keystone Investments, Inc. 
                    200 Berkeley Street 
                    Boston, MA 02116 

With a copy to:     Rosemary D. Van Antwerp 
                    Senior Vice President and Secretary 
                    c/o Keystone Investments, Inc. 
                    200 Berkeley Street 
                    Boston, MA 02116 

To KTFF:            Albert H. Elfner, III 
                    Chairman, President and Chief Executive 
                    Officer 
                    c/o Keystone Investments, Inc. 
                    200 Berkeley Street 
                    Boston, MA 02116 

With a copy to:     Rosemary D. Van Antwerp 
                    Senior Vice President and Secretary 
                    c/o Keystone Investments, Inc. 
                    200 Berkeley Street 
                    Boston, MA 02116 
</TABLE>

   The address of any of the foregoing may be changed by notice given to the 
other party in accordance with this Subsection. 

   14.2 Recourse Limited. Each of KTET and KTFF is a Massachusetts business 
trust established under a Declaration of Trust, as amended from time to time. 
The obligations of each of KTET and KTFF are not personally binding upon, nor 
shall recourse be had against the private property of any of its Trustees, 
shareholders, officers, employees, or agents, but only property of KTET or 
KTFF, as the case may be, shall be bound. 

   14.3 Entire Agreement. This Agreement supersedes all prior agreements 
between the parties whether written or oral, is intended as a complete and 
exclusive statement of the terms of the Agreement between the parties, and 
may not be changed or terminated orally. 

   14.4 Counterparts. This Agreement may be executed in one or more 
counterparts, all of which shall be considered one and the same agreement, 
and shall become effective when one or more counterparts have been executed 
on behalf of KTET and KTFF and delivered to each of the parties hereto. 

   14.5 Headings. The headings contained in this Agreement are for reference 
purposes only and shall not affect in any way the meaning or interpretation 
of this Agreement. 

                                      A-15 
<PAGE>
 
14.6 No Third Party Rights. Nothing in this Agreement expressed or 
implied, is intended to confer upon any other person any rights or remedies 
under or by reason of this Agreement. In addition, the parties hereto 
represent and warrant that they have not employed any broker, finder, or 
intermediary in connection with this transaction who might be entitled to a 
finder's fee or other similar fee or commission. 

   14.7 Governing Law. This Agreement shall be governed by and construed in 
accordance with the laws of The Commonwealth of Massachusetts. 

   [THIS REST OF THIS PAGE IS LEFT INTENTIONALLY BLANK.] 

                                      A-16 
<PAGE>
 
In Witness Whereof, the undersigned have executed this Agreement as of the 
date first above written. 

<TABLE>
<CAPTION>
<S>           <C>
              KEYSTONE TAX EXEMPT TRUST 
ATTEST:       By: 
              Albert H. Elfner, III 
              Chief Executive Officer and 
              President 
              KEYSTONE TAX FREE FUND 
ATTEST:       By: 
              Albert H. Elfner, III 
              Chief Executive Officer and 
              President 

</TABLE>

                                      A-17 
<PAGE>
 
EXHIBIT B 

                             FINANCIAL HIGHLIGHTS 

                            Keystone Tax Free Fund 
                (For a Share outstanding throughout the year) 

   The following table contains important financial informatiaon relating to 
the Fund and has been audited by KPMG Peat Marwick LLP, the Fund's 
independent auditors. The table appears in the Fund's Annual Report and 
should be read in conjunction with the Fund's financial statements and 
related notes, which also appear, together with the independent auditors' 
report, in the Fund's Annual Report. The Fund's financial statements, related 
notes and independent auditors' report are included in the statement of 
additional information. Additional information about the Fund's performance 
is contained in its Annual Report, which will be made available upon request 
and without charge. 

FINANCIAL HIGHLIGHTS 
(For a share outstanding throughout the year) 

<TABLE>
<CAPTION>
                                                            Year Ended December 31, 
                                         -------------------------------------------------------------- 
                                            1994         1993         1992         1991       1990(d) 
=====================================     =========    =========    =========    =========   ========== 
<S>                                         <C>          <C>          <C>          <C>           <C>
Net asset value: 
 Beginning of year                   $        8.12 $       8.04 $        8.07 $      7.90 $        8.06 
- -------------------------------------      -------      -------      -------      -------      -------- 
Income from investment operations: 
Investment income--net                        0.37         0.39          0.46        0.46          0.52 
Net gains (losses) on investments            (0.96)        0.48          0.12        0.36         (0.01) 
Net commissions paid on fund share 
  sales(b)                                    -0-          -0-          -0-          -0-           -0- 
- -------------------------------------      -------      -------      -------      -------      -------- 
 Total from investment operations            (0.59)        0.87          0.58        0.82          0.51 
- -------------------------------------      -------      -------      -------      -------      -------- 
Less distributions from(a): 
Investment income--net                       (0.37)       (0.39)        (0.46)      (0.46)        (0.52) 
In excess of investment income--net          (0.06)       (0.06)        (0.04)      (0.07)        (0.03) 
Realized capital gains--net                   -0-         (0.33)        (0.11)      (0.12)        (0.12) 
In excess of realized capital 
  gains--net                                  -0-         (0.01)        -0-          -0-           -0- 
- -------------------------------------      -------      -------      -------      -------      -------- 
 Total distributions                         (0.43)       (0.79)       (0.61)       (0.65)        (0.67) 
- -------------------------------------      -------      -------      -------      -------      -------- 
Net asset value: End of year         $        7.10 $       8.12 $       8.04 $       8.07 $        7.90 
=====================================      =======      =======      =======      =======      ======== 
Total return(c)                              (7.34%)      11.15%        7.55%       10.80%          6.66% 
Ratios/supplemental data 
Ratios to average net assets: 
 Operating and management expenses            1.55%        1.66%        1.38%       1.75%          1.18% 
 Investment income--net                       4.92%        4.72%        5.71%       5.78%          6.54% 
Portfolio turnover rate                         84%          76%          78%         77%            64% 
Net assets, end of year (thousands)     $1,197,727   $1,548,503   $1,453,199   $1,146,185    $1,060,826 
=====================================   ==========   ==========   ==========   ==========    ========== 
</TABLE>

                                      B-1 
<PAGE>
 
<TABLE>
<CAPTION>
                                                        Year Ended December 31, 
                                         ------------------------------------------------------ 
                                           1989       1988       1987        1986        1985 
=====================================     =======    =======    =======    =========   ======== 
<S>                                        <C>        <C>        <C>        <C>           <C>
Net asset value: 
 Beginning of year                      $   8.18 $     8.09 $     8.85 $       8.31   $    7.57 
- -------------------------------------      -----      -----      -----       -------      ------ 
Income from investment operations: 
Investment income--net                      0.57       0.55       0.56         0.68        0.70 
Net gains (losses) on investments           0.15       0.30      (0.58)        0.88        0.81 
Net commissions paid on fund share 
  sales(b)                                  -0-        -0-        -0-         (0.08)      (0.07) 
- -------------------------------------      -----      -----      -----      -------      ------ 
 Total from investment  operations          0.72       0.85      (0.02)        1.48        1.44 
- -------------------------------------      -----      -----      -----      -------      ------ 
Less distributions from(a): 
Investment income--net                     (0.60)     (0.63)     (0.64)       (0.68)      (0.70) 
In excess of investment income--net         -0-        -0-        -0-          -0-         -0- 
Realized capital gains--net                (0.24)     (0.13)     (0.10)       (0.26)       -0- 
In excess of realized capital 
  gains--net                                -0-        -0-        -0-          -0-         -0- 
- -------------------------------------      -----      -----      -----      -------      ------ 
 Total distributions                       (0.84)     (0.76)     (0.74)       (0.94)      (0.70) 
- -------------------------------------      -----      -----      -----      -------      ------ 
Net asset value: End of year            $   8.06 $     8.18 $     8.09 $       8.85 $      8.31 
=====================================      =====      =====      =====      =======      ====== 
Total return(c)                             9.11%     10.89%     (0.14)%      18.26%      19.96% 
Ratios/supplemental data 
Ratios to average net assets: 
 Operating and  management expenses         1.23%      1.79%      1.70%        0.83%       0.92% 
 Investment income--net                     6.94%      6.74%      6.80%        7.79%       8.65% 
Portfolio turnover rate                       69%        61%        43%          44%         55% 
Net assets, end of year (thousands)     $901,912   $903,132   $894,768   $1,025,084    $863,720 
=====================================   ========   ========   ========   ==========    ======== 
</TABLE>


(a) Effective January 1, 1993 the Fund adopted Statement of Position 93-2: 
"Determination, Disclosure, and Financial Statement Presentation of Income 
Capital Gain and Return of Capital Distributions by Investment Companies." As 
a result, distribution amounts exceeding book basis investment income--net 
(or tax basis net income on a temporary basis) are presented as 
"Distributions in excess of investment income--net." Similarly, capital gain 
distributions in excess of book basis capital gains (or tax basis capital 
gains on a temporary basis) are presented as "Distributions in excess of 
realized capital gains." For the fiscal years ended December 31, 1992, 1991, 
and 1990, distributions in excess of book basis net income were presented as 
"distribution from paid-in capital". 
(b) Prior to June 30, 1987, net commissions paid on new sales of shares under 
the Fund's Rule 12b-1 Distribution Plan had been treated for both financial 
statement and tax purposes as capital charges. On June 11, 1987, the 
Securities and Exchange Commission adopted a rule which required for 
financial statements for the periods ended on or after June 30, 1987, that 
net commissions paid under Rule 12b-1 be treated as operating expenses rather 
than capital charges. Accordingly, beginning with the year ended December 31, 
1987, the Fund's financial statements reflect 12b-1 Distribution Plan 
expenses (i.e., shareholder servicing fees plus commissions paid net of 
deferred sales charges received by the Fund) as a component of net investment 
income. 
(c) Excluding contingent deferred sales charges. 
(d) Calculation based on average shares outstanding. 



                                      B-2 
<PAGE>
 
EXHIBIT C 

                MANAGEMENT'S DISCUSSION OF KTFF'S PERFORMANCE 

Keystone Tax Free Fund 
Seeks high current income, exempt from federal income taxes, while preserving 
capital by investing in high quality municipal bonds. 

Dear Shareholder: 

We are pleased to report to you on activities in Keystone Tax Free Fund for 
the fiscal year which ended December 31, 1994. 

Performance 

Your Fund returned -7.34% for the twelve-month period. 

   It is only during unusual periods that high quality municipal bond funds 
produce negative returns, and the past year was one of those exceptions. Your 
Fund's returns were symptomatic of the municipal bond market's performance. 
When the increases in short-term interest rates began in February, the bond 
market reacted very strongly with rates rising and prices falling. As is 
frequently the case during economic expansions, we believe the bond markets 
may have over-reacted to these rate increases. 

   1994 was a year of transition for municipal bond investors, as interest 
rates rose from historic lows to higher, and we believe, more sustainable 
levels. However, we think most of the market turbulence is now behind us, and 
believe there are many good reasons to maintain an investment in a broadly 
diversified portfolio of municipal bonds: 

   (bullet) Share prices should stabilize over the coming months, because the 
likelihood of major rate increases is much lower than it was at the beginning 
of 1994. 

   (bullet) Yields are much higher than they were a year ago. The yield on a 
Aa-rated electric bond on December 31, 1994 was 6.85% compared to 5.60% one 
year earlier.(1) 

   (bullet) Municipal bonds represent a very attractive value with yields 
currently equal to 87% of a comparable US Treasury bond.(2) 

   (bullet) Tax-free bonds remain one of the few investments exempt from 
federal income taxes,(3) allowing you to keep more of what you earn. 

(1)The yields on the Lehman Aa Electric Municipal Bond Index as of December 
31, 1993 and December 31,1994. Source: Lehman Brothers, Inc. 
(2)Source: Keystone Custodian Funds, Inc. Based on a random selection of 
30-year Aa-rated municipal bonds versus the yield on the 30-year US Treasury 
bond on December 31, 1994. 
(3)For investors in certain tax situations, a portion of income may be 
subject to the federal alternative minimum tax (AMT). 

                                      C-1 
<PAGE>
 
We have taken steps to carefully position your Fund's holdings in the 
context of this higher interest rate environment. We are currently 
emphasizing higher coupon bonds which tend to provide more attractive income 
and better price stability than comparable discount bonds. Throughout the 
period, we maintained our commitment to better quality municipal bonds. At 
the end of the period, the portfolio continued to maintain a Aa average 
rating, the second best, and its average maturity was about 19 years. While 
municipal bonds will fluctuate in price, we believe that better quality bonds 
can provide more consistent income and improved price stability than lower 
quality municipal bonds over the long term. 

Outlook 

While rates may inch higher in the coming months, we anticipate an improved 
environment for municipal bond investors in 1995. The combination of lower 
bond prices and higher yields should create more positive conditions for 
investors seeking tax-free income. If inflation remains moderate as expected, 
real after-tax returns are likely to be quite attractive. 

   We encourage you to maintain a long-term perspective about Keystone Tax 
Free Fund. Over time, investment returns tend to even out, rewarding 
investors who are able to tolerate short-term price fluctuations. As market 
conditions change, we will continue to manage your Fund to seek valuable 
tax-free income from a portfolio of quality municipal obligations.(3) 

   We appreciate your continued support of Keystone funds. If you have any 
questions or comments, please feel free to call or write to us. 

Sincerely, 
[signature of George S. Bissell] 

George S. Bissell 
Chairman 

[signature of Albert H Elfner, III] 

Albert H. Elfner, III 
President 

February 1995 

                                      C-2 
<PAGE>
 
A Discussion With Your Fund Manager 

   Betsy A. Blacher is vice president and senior portfolio manager at 
Keystone specializing in tax-free municipal bonds. A professional with 16 
years of investment experience, Ms. Blacher is portfolio manager of Keystone 
Tax Free Fund. 

What does the Fund offer investors? 
The Fund is designed for tax-sensitive investors. It seeks consistent, 
attractive income that is exempt from federal income tax.(3) The Fund offers 
professional management and diversification from a portfolio of quality 
municipal bonds. We manage the Fund with careful attention to credit quality 
and financial stability. 

How did municipal bonds perform over the past year? 

   The past year has been a very difficult time for the bond market in 
general. Since February 1994, interest rates have been climbing. There were 
six increases in short-term interest rates totaling 2.25 percentage points. 
When rates go up, bond prices tend to go down. 

Portfolio Quality Summary as of December 31, 1994 

Moody's Rating--Where Moody's ratings were not available, we have used 
ratings from Standard & Poor's Corporation, Fitch Investor's Service, Inc. or 
ratings assigned by another nationally recognized statistical rating 
organization. 

Aaa (38%); Aa (18%); A (24%); Baa (11%); Not rated (6%); Other (3%)-- 
Includes securities rated below Baa (1%), short-term obligations, and other 
assets and liabilities. 

How did the Fund perform? 

   Generally, the Fund generated returns that paralleled the performance of 
the municipal bond market. The Fund continued to provide shareholders with 
attractive tax-free income, but rising interest rates caused bond prices to 
decline during this time period. A negative total return is relatively 
unusual for municipal bonds, but was unavoidable under the prevailing market 
conditions. 

Should investors be concerned about this year's market activity? 
Although shareholders may be concerned about the Fund's short-term 
performance, understanding the cyclical nature of the bond market provides an 
important perspective. Price declines are a normal market reaction to rising 
interest rates. As interest rates level out, prices should also stabilize. 
We're beginning to see evidence of this already. The market has begun to 
adjust to the higher rates, and the most recent increases have had a more 
limited effect on bond prices. In this type of market, it is especially 
important to maintain a long-term outlook. Over time, price changes have 
tended to even out, providing long-term investors with an opportunity for 
improved returns. 

What changes did you make in response to the interest rate increases? 
As interest rates began to rise, we generally shortened the Fund's maturity 
to reduce price volatility. We also emphasized higher coupon issues and kept 
more cash on hand. While this strategy did not prevent price declines, it did 
help reduce 

                                      C-3 
<PAGE>
 
share price fluctuations. Between August and December, we became more fully 
invested again, reducing the portfolio's cash position. We aimed for an 
average maturity of about 19 years, emphasized non-callable bonds, and 
continued to purchase higher coupon issues. While the portfolio is still 
positioned somewhat defensively, it is now more fully invested in bonds to 
take advantage of the higher yields currently available. 

- --------------------------------------------------------------------------------
[Plot points for bar chart]

     Relatively Attractice
     Municipal Bond Yields
     as of December 31, 1994

     8%
     ---------------------------------------------
                                  __________
             __________           |        |
     6       |        |           |        |
     --------|        |-----------|        |------
             |        |           |        |
             |        |           |        |
     4       |        |           |        |
     --------|  6.85  |-----------|  7.87  |------
             |        |           |        |
             |        |           |        |
     2       |        |           |        |
     --------|        |-----------|        |------
             |        |           |        |
             |        |           |        |
     0       |        |           |        |
     ---------------------------------------------
             Municipal           U.S. Treasury
               Bonds                 Bond

Municipal bond yields recently equalled 87% of the yield on a comparable U.S.
Treasury bond.


Source: Keystone Custodian Funds, Inc. 
Based on a random selection of 30-year Aa-rated municipal bonds versus the 
yield on the 30-year US Treasury bond on December 31, 1994. 

What is your outlook for the municipal bond market? 
We are cautiously optimistic. We believe that the worst is now behind us, and 
that today's market offers investors some good opportunities. The combination 
of higher yields and relatively low inflation has resulted in very attractive 
after-tax returns. We expect demand for municipal bonds to increase, as the 
investment markets stabilize. The supply of new issues is comparatively 
light, which could have a positive effect on the value of existing bonds. 

                                      C-4 
<PAGE>
 
What do you look for when selecting bonds for the Fund? 
We are extremely selective about fund holdings. A strong credit rating, 
generally A or better, is a good start, but it's only the beginning. The 
health of the local economy, fiscal policy, tax receipt cash flows, and the 
state legislative climate are all important factors. We consider the taxing 
power of the issuer and the expected cash flows from the project. Overall, we 
look for bond issues that have solid financial positions and are attractively 
priced. 

 Lately, we've placed increasing emphasis on evaluating the current yield and 
maturity of bonds in addition to our careful financial evaluation. As a 
general rule, we prefer higher coupon bonds, because their higher income 
makes them more resistant to market downturns. And finally, we evaluate how a 
potential holding will fit with the existing composition of the portfolio. We 
attempt to build a portfolio that is broadly diversified, both by geography 
and by sector. 

What sectors do you currently favor? 
In today's changing market environment we're leaning toward stable, non- 
cyclical sectors whenever possible, such as transportation, highways and 
infrastructure issues. These bond issues tend to have defined and reliable 
revenue sources. We're also exploring several alternative energy issues to 
determine whether there is value in the new technology. 

Is this a good time for investors to buy tax free funds? 
Yes. We believe municipal bonds are more attractive than they have been in 
four years. With bond yields up and an expectation for improved stability in 
the markets, we think municipal bonds will provide attractive income over the 
next six months or so. More importantly, we believe yields on municipal bonds 
are very attractive, with yields equaling 87% of taxable bonds. 

 While it is impossible to know how the market will perform, share prices 
have already reached attractive levels, and this may be an opportune time to 
consider adding to tax-exempt holdings. Of course there is always risk 
associated with investing, but Keystone Tax Free Fund will continue to offer 
investors a diversified, professionally managed opportunity for income that 
is exempt from federal taxation.(3) 

                                      C-5 
<PAGE>
 
Your Fund's Performance 


- --------------------------------------------------------------------------------
[Plot points for mountain chart showing growth of fund from 12/84 through 12/94]


     Growth of an investment in
     Keystone Tax Free Fund

     In Thousands


     9.95    9.985
     10.11   10.202
     11.4    12.357
     10.08   11.779
     10.6    13.293
     10.9    14.622
     10.76   15.423
     10.92   16.785
     11.06   18.26
     11.08   19.957
     9.73    18.54

     A $10,000 investment in Keystone Tax Free Fund made on December
     31, 1984 with all distributions reinvested was woth $22,442 on
     December 31, 1984. Past performance is no guarantee of future results.
- --------------------------------------------------------------------------------

The "if you redeemed" returns reflect the deduction of the 3% CDSC for those 
investors who sold Fund shares after one calendar year. Investors who 
retained their fund investment earned the returns reported in the second 
column of the table. 

The investment return and principal value will fluctuate so that your shares, 
when redeemed, may be worth more or less than the original cost. 

                                      C-6 
<PAGE>
 
Twelve-Month Performance as of December 31, 1994 

<TABLE>
<CAPTION>
<S>              <C>       <C>
Total return*                  -7.34% 
Net asset 
  value          12/31/93  $    8.12 
                 12/31/94  $    7.10 
Dividends                  $    0.43 
Capital gains               None 
</TABLE>

* Before deduction of contingent deferred sales charge (CDSC). 

Historical Record as of December 31, 1994 

<TABLE>
<CAPTION>
                               If you    If you did 
Cumulative Total Return      redeemed    not redeem 
<S>                          <C>         <C>
1-year                          -9.96%      -7.34% 
5-year                          30.92%      30.92% 
10-year                        124.42%     124.42% 
Average Annual Total 
  Return 
1-year                          -9.96%      -7.34% 
5-year                           5.54%       5.54% 
10-year                          8.42%       8.42% 
</TABLE>
You may exchange your shares for another Keystone fund by phone or in writing 
for a $10 fee. The exchange fee is waived for individual investors who make 
an exchange using Keystone's Automated Response Line (KARL). The Fund 
reserves the right to change or terminate the exchange offer. 

                                      C-7 
<PAGE>
 
                            Growth of an Investment

Comparison of change in value of a $10,000 investment in Keystone Tax Free 
Fund, the Lehman Municipal Bond Index, and the Consumer Price Index. 

- --------------------------------------------------------------------------------
[Plot points for line chart]

       Comparison of change in value of a $10,000 investment
       in Keystone Tax Free Fund, the Lehman Municipal
       Bond Index, and the Consumer Price Index.

       In Thousands      December 31, 1984 through December 31, 1994
- --------------------------------------------------------------------------------
               Fund Average
            Annual Total Return
          -----------------------
          1 Year  5 Year  10 Year
         -9.96%    5,54%   8.42%

      9500   8300   9626  12146  11921  13912  15658  17641  17173  22442

      9999   8071   9918  12939  12468  15002  17778  19574  19780  24731

     10000  10294  10731  11231  11936  12293  12667  13006  13336  14217
- --------------------------------------------------------------------------------
    12/84        12/86        12/88        12/90        12/92        12/94

         LMBI $24,731        Fund $22,442        CPI $14,217

       Past performance is no guarantee of future results. The one-year return
reflects the deduction of the Fund's 3% contingent deferred sales charge for
shares held more than one year. Consumer Price Index is through November 30,
1994.

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

This chart graphically compares your Fund's total return performance to 
certain investment indexes. It is the result of fund performance guidelines 
issued by the Securities and Exchange Commission. The intent is to provide 
investors with more information about their investment. 

Components of the Chart 
The chart is composed of several lines that represent the accumulated value 
of an initial $10,000 investment for the period indicated. The lines 
illustrate a hypothetical investment in: 

1. Keystone Tax Free Fund 
Your Fund seeks current income, exempt from federal income taxes, while 
preserving capital by investing in high quality municipal bonds. The return 
is quoted after deducting sales charges (if applicable), fund expenses, and 
transaction costs and assumes reinvestment of all distributions. 

2. Lehman Municipal Bond Index (LMBI) 
The LMBI is a broad-based, unmanaged market index of securities issued by 
state and local governments. It represents the price change and coupon income 
of 

                                      C-8 
<PAGE>
 
several thousand securities with various maturities and qualities. Securities 
are selected and compiled by Lehman Brothers, Inc. according to criteria that 
may be unrelated to your Fund's investment objective. 

3. Consumer Price Index (CPI) 
This index is a widely recognized measure of the cost of goods and services 
produced in the U.S. The index contains factors such as prices of services, 
housing, food, transportation and electricity which are compiled by the U.S. 
Bureau of Labor Statistics. The CPI is generally considered a valuable 
benchmark for investors who seek to outperform increases in the cost of 
living. 

   The indexes do not include transaction costs associated with buying and 
selling securities, and do not hold cash to meet redemptions. It would be 
difficult for most individual investors to duplicate the indexes. 

Understanding What the Chart Means 
The chart demonstrates your Fund's total return performance in relation to a 
well known investment index and to increases in the cost of living. It is 
important to understand what the chart shows and does not show. 

   This illustration is useful because it charts Fund and index performance 
over the same time frame and over a long period. Long-term performance is a 
more reliable and useful measure of performance than measurements of 
short-term returns or temporary swings in the market. Your financial adviser 
can help you evaluate fund performance in conjunction with the other 
important financial considerations such as safety, stability and consistency. 
 

                                      C-9 
<PAGE>
 



4

<PAGE>


                                TABLE OF CONTENTS




IMPORTANT DEFINITIONS........................................


SYNOPSIS.....................................................


PRINCIPAL RISK FACTORS.......................................


THE REORGANIZATION...........................................


INFORMATION ABOUT THE FUNDS..................................


ADDITIONAL INFORMATION ABOUT THE FUNDS.......................



<PAGE>


















                                     PART B





<PAGE>


Part B


          INFORMATION REQUIRED IN A STATEMENT OF ADDITIONAL INFORMATION

                             KEYSTONE TAX FREE FUND

                       Statement of Additional Information

                                December 20, 1995



      This Statement of Additional Information contains or incorporates by
reference material which may be of interest to investors but which is not
included in the Prospectus/Proxy Statement ("Prospectus") of Keystone Tax Free
Fund dated December 20, 1995. This Statement is not a Prospectus and is
authorized for distribution only when it accompanies or follows delivery of the
above-referenced Prospectus. This Statement should be read in conjunction with
the Prospectus. Copies of the Prospectus can be obtained by writing to Keystone
Tax Free Fund, 200 Berkeley Street, Boston, Massachusetts 02116-5034, or calling
(800) 343-2898.


                                TABLE OF CONTENTS


      This Statement of Additional Information contains or incorporates by
reference the following:


I.   Statement of Additional Information of Keystone Tax Free Fund dated April
     28, 1995, which is hereby incorporated by reference herein.

II.  Annual Report of Keystone Tax Free Fund for the fiscal year ended December
     31, 1994, which is hereby incorporated by reference herein.

III. Semi-Annual Report of Keystone Tax Free Fund for the fiscal period ended
     June 30, 1995, which is hereby incorporated by reference herein.

IV.  Statement of Additional Information of Keystone Tax Exempt Trust dated
     March 31, 1995, which is hereby incorporated by reference herein.

V.   Annual Report of Keystone Tax Exempt Trust for the fiscal year ended
     November 30, 1994, which is hereby incorporated by reference herein.




<PAGE>





VI.  Semi-Annual Report of Keystone Tax Exempt Trust for the fiscal period ended
     May 31, 1995, which is hereby incorporated by reference herein.

VII. Pro Forma Combined Statement of Assets and Liabilities of Keystone Tax
     Exempt Trust and Keystone Tax Free Fund as of June 30, 1995 and the
     Combined Statement of Operations for (i) the fiscal year ended December 31,
     1994 and (ii) the fiscal period ended June 30, 1995.



<PAGE>


                                     PART C





<PAGE>


Part C


                                OTHER INFORMATION



Item 15.  Indemnification
          ---------------

          Provisions for indemnification of Registrant's Trustees and officers
          are contained in Article VIII of Registrant's Amended and Restated
          Declaration of Trust, a copy of which was filed with Post-Effective
          Amendment No. 24 to Registration Statement No. 2-58699/811-2740 as
          Exhibit 24(b)(1) and is incorporated by reference herein.

          Provisions for this indemnification of Keystone Management, Inc. and
          Keystone Investment Management Company, investment manger and
          investment advisor to the Fund, respectively, are contained in Section
          7 of the Investment Management Agreement between Registrant and
          Keystone Management, Inc. and Section 6 of the Investment Advisory
          Agreement between Keystone Management, Inc. and Keystone Investment
          Management Company, copies of which were filed with Post-Effective
          Amendment No. 24 to Registration Statement No. 2-58699/811-2740 as
          Exhibits 24(b)(5)(A) and 24(b)(5)(B), respectively, and are
          incorporated by reference herein.

Item 16.  Exhibits
          --------

1.        A copy of the Registrant's Amended and Restated Declaration if Trust
          dated July 27, 1993 was filed with Post-Effective Amendment No. 24 to
          Registration Statement No. 2-58669/811-2740 as Exhibit 24(b)(1) and is
          incorporated by reference herein.

2.        A copy of the Registrant's By-laws was filed with Post-Effective
          Amendment No. 2 to registration Statement No. 2-58699/811-2740 as
          Exhibit 24(b)(2) and is incorporated by reference herein.

3.        Not applicable.

4.        Agreement and Plan of Reorganization constitutes Exhibit A included in
          Part A hereof.

5.        a. Registrant's Prospectus and Statement of Additional Information was
             filed with Registrant's Post-Effective Amendment No. 24 to
             Registration Statement No. 2-58699/811-2740 in Part A and is
             incorporated by reference herein.


<PAGE>

          b. Registrant's  Restated  Declaration of Trust,  Articles III, V and
             VI.

          c. Registrant's By-Laws, Article 2, Section 2.5.

6.        a. A copy of the Investment Management Agreement between Keystone
             Management, Inc. and the Registrant dated August 19, 1993 was filed
             with Post-Effective Amendment No. 24 to Registration Statement No.
             2-58699/811-2740 as Exhibit 24(b)(5)(A) and is incorporated by
             reference herein.

          b. A copy of the Investment Advisory Agreement between Keystone
             Management, Inc. and Keystone Investment Management Company
             (formerly known as Keystone Custodian Funds, Inc.) dated August 19,
             1993 was filed with Post-Effective Amendment No. 24 to Registration
             Statement No. 2-58699/811-2740 as Exhibit 24(b)(5)(B) and is
             incorporated by reference herein.

7.        a. A copy of the Principal Underwriting Agreement between the
             Registrant and Keystone Investment Distributors Company (formerly
             known as Keystone Distributors, Inc.) dated August 19, 1993 was
             filed with Post-Effective Amendment No. 24 to Registration
             Statement No. 2-58699/811-2740 as part of Exhibit 24(b)(6) and is
             incorporated by reference herein.

          b. A specimen of the form of Dealer Agreement to be used by the
             principal underwriter was filed with Post-Effective Amendment No.
             20 to Registration Statement No. 2-58699/811-2740 as part of
             Exhibit 24(b)(6) and is incorporated by reference herein.

8.           Not applicable.

9.        A copy of the Custodian Agreement between the Registrant and State
          Street Bank and Trust Company was filed with Post-Effective Amendment
          No. 2 to the Fund's Registration Statement as Exhibit 24(b)(8) and is
          incorporated by reference herein. Copies of Amendments Nos. 1-6 to the
          Custodian, Fund Accounting and Recordkeeping Agreement between the
          Registrant and State Street Bank and Trust Company were filed with
          Post-Effective Amendment No. 23 to Registration Statement No.
          2-58699/811-2740 as part of Exhibit 24(b)(8) and are incorporated by
          reference herein.




<PAGE>


Item 16.  Exhibits (continued)
          --------

10.       A copy of the Registrant's Distribution Plan adopted pursuant to Rule
          12b-1 was filed with Post-Effective Amendment No. 8 to Registration
          Statement No. 2-58699/811-2740 as part of Exhibit 24(b)(15) is
          incorporated by reference herein.

11.       An Opinion and Consent of Counsel as to the legality of the securities
          registered by Registrant is filed herewith as Exhibit 11.

12.       Opinion and Consent of Counsel as to tax matters and consequences to
          shareholders is filed herewith as Exhibit 12.

13.       Not applicable.

14.       Consent of Independent Auditors is filed herewith as Exhibit 14.

15.       Not applicable.

16.       Powers of Attorney are filed herewith as Exhibit 16.

17.       a. Copies of Registrant's Declaration under Rule 24f-2 and an opinion
             and consent of counsel dated January 25, 1995 as to the legality of
             shares being registered are filed herewith as Exhibit 17(a).

          b. Form of Proxy Card is filed herewith as Exhibit 17(b).

          c. KTFF's prospectus dated April 28, 1995 is filed herewith as Exhibit
             17(c).




<PAGE>


Item 17.  Undertakings
          ------------

          (1) The undersigned Registrant agrees that prior to any public
              reoffering of the securities registered through the use of a
              prospectus which is part of this registration statement by any
              person or party who is deemed to be an underwriter within the 
              meaning of Rule 145(c) of the Securities Act of 1933, the 
              reoffering prospectus will contain the information called for by 
              the applicable registration form for reofferings by persons who 
              may be deemed underwriters, in addition to the information called
              for by the other items of the applicable form.

          (2) The undersigned Registrant agrees that every prospectus that is
              filed under paragraph (1) above will be filed as a part of an
              amendment to the registration statement and will not be used 
              until the amendment is effective, and that, in determining any 
              liability under the 1933 Act, each post-effective amendment shall
              be deemed to be a new registration statement for the securities 
              offered therein, and the offering of the securities at that time 
              shall be deemed to be the initial bona fide offering of them.


<PAGE>


                                   SIGNATURES
                                   ----------


      Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed on behalf of the Registrant, by the
undersigned, thereunto duly authorized, in the City of Boston, in The
Commonwealth of Massachusetts, on the 20th day of November, 1995.


                                    KEYSTONE TAX EXEMPT TRUST


                                    By: /s/ George S. Bissell
                                        ---------------------------
                                        George S. Bissell*
                                        Chairman of the Board


                                   *By: /s/ Melina M.T. Murphy
                                        ---------------------------
                                        Melina M.T. Murphy**
                                        Attorney-in-Fact


Pursuant to the requirements of the Securities Act of 1933, this Registration
Statement has been signed below by the following persons in the capacities
indicated on the 20th day of November, 1995.


SIGNATURES                    TITLE
- ----------                    -----


/s/ George S. Bissell         Chairman of the Board and Trustee
- ---------------------------
George S. Bissell*


/s/ Albert H. Elfner, III     Chief Executive Officer, President
- ---------------------------   and Trustee
Albert H. Elfner, III*


/s/ Kevin J. Morrissey        Treasurer (Principal Financial
- ---------------------------   and Accounting Officer)
Kevin J. Morrissey*



                                   *By: /s/ Melina M.T. Murphy
                                        ---------------------------
                                        Melina M.T. Murphy**
                                        Attorney-in-Fact




<PAGE>


SIGNATURES                    TITLE
- ----------                    -----


/s/ Frederick Amling          Trustee
- ---------------------------
Frederick Amling*


/s/ Charles A. Austin, III    Trustee
- ---------------------------
Charles A. Austin, III*


/s/ Edwin D. Campbell         Trustee
- ---------------------------
Edwin D. Campbell*


/s/ Charles F. Chapin         Trustee
- ---------------------------
Charles F. Chapin*


/s/ K. Dun Gifford            Trustee
- ---------------------------
K. Dun Gifford*


/s/ Leroy Keith, Jr.          Trustee
- ---------------------------
Leroy Keith, Jr.*


/s/ F. Ray Keyser, Jr.        Trustee
- ---------------------------
F. Ray Keyser, Jr.*


/s/ David M. Richardson       Trustee
- ---------------------------
David M. Richardson*


/s/ Richard J. Shima          Trustee
- ---------------------------
Richard J. Shima*


/s/ Andrew J. Simons          Trustee
- ---------------------------
Andrew J. Simons*



                                   *By: /s/ Melina M.T. Murphy
                                        ---------------------------
                                        Melina M.T. Murphy**
                                        Attorney-in-Fact


** Melina M.T. Murphy, by signing her name hereto, does hereby sign this
document on behalf of each of the above-named individuals pursuant to powers of
attorney duly executed by such persons and attached hereto as Exhibit 24(b)(16).




<PAGE>


                                   SIGNATURES
                                   ----------


      Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed on behalf of the Registrant, by the
undersigned, thereunto duly authorized, in the City of Boston, in The
Commonwealth of Massachusetts, on the 20th day of November, 1995.


                                    KEYSTONE TAX EXEMPT TRUST


                                    By: /s/ George S. Bissell
                                        ---------------------------
                                    George S. Bissell*
                                    Chairman of the Board


                                   *By:
                                        ---------------------------
                                        Melina M.T. Murphy**
                                        Attorney-in-Fact


Pursuant to the requirements of the Securities Act of 1933, this Registration
Statement has been signed below by the following persons in the capacities
indicated on the 20th day of November, 1995.


SIGNATURES                    TITLE
- ----------                    -----


/s/ George S. Bissell         Chairman of the Board and Trustee
- ---------------------------
George S. Bissell*


/s/ Albert H. Elfner, III     Chief Executive Officer, President
- ---------------------------   and Trustee
Albert H. Elfner, III*        


/s/ Kevin J. Morrissey        Treasurer (Principal Financial
- ---------------------------   and Accountng Officer)
Kevin J. Morrissey*           



                                   *By:
                                        ---------------------------
                                        Melina M.T. Murphy**
                                        Attorney-in-Fact




<PAGE>


SIGNATURES                    TITLE
- ----------                    -----


/s/ Frederick Amling          Trustee
- ---------------------------
Frederick Amling*


/s/ Charles A. Austin, III    Trustee
- ---------------------------
Charles A. Austin, III*


/s/ Edwin D. Campbell         Trustee
- ---------------------------
Edwin D. Campbell*


/s/ Charles F. Chapin         Trustee
- ---------------------------
Charles F. Chapin*


/s/ K. Dun Gifford            Trustee
- ---------------------------
K. Dun Gifford*


/s/ Leroy Keith, Jr.          Trustee
- ---------------------------
Leroy Keith, Jr.*


/s/ F. Ray Keyser, Jr.        Trustee
- ---------------------------
F. Ray Keyser, Jr.*


/s/ David M. Richardson       Trustee
- ---------------------------
David M. Richardson*


/s/ Richard J. Shima          Trustee
- ---------------------------
Richard J. Shima*


/s/ Andrew J. Simons          Trustee
- ---------------------------
Andrew J. Simons*



                                   *By:
                                        ---------------------------
                                        Melina M.T. Murphy**
                                        Attorney-in-Fact


** Melina M.T. Murphy, by signing her name hereto, does hereby sign this
document on behalf of each of the above-named individuals pursuant to powers of
attorney duly executed by such persons and attached hereto as Exhibit 24(b)(16).




<PAGE>



                             KEYSTONE TAX FREE FUND

                            KEYSTONE TAX EXEMPT TRUST



                          PRO FORMA COMBINED FINANCIALS




     1.   STATEMENT OF ASSETS AND LIABILITIES AS OF DECEMBER 31, 1994 AND JUNE
          30, 1995


     2.   STATEMENT OF OPERATIONS FOR THE PERIODS DECEMBER 31, 1994 AND JUNE 30,
          1995 AND RELATED NOTES TO FINANCIALS



<PAGE>



KEYSTONE TAX FREE FUND
KEYSTONE TAX EXEMPT TRUST
PROFORMA COMBINING STATEMENT OF ASSETS AND LIABILITIES - 
  JUNE 30, 1995 (Unaudited)

<TABLE>
<CAPTION>
                                                          Keystone Tax             Keystone Tax              Pro-forma
                                                           Free Fund              Exempt Trust              Combined
- ---------------------------------------------------  ----------------------   ---------------------   ---------------------
<S>                                                  <C>                      <C>                     <C>             
Assets:
     Investments at market value (a)                 $  1,214,346,403         $  688,861,773          $  1,903,208,176
     Mark-to-market on futures contracts                        9,663                   (239)                    9,424
     Cash                                                     273,344                102,381                   375,725
     Receivable for:
         Investments sold                                          --              4,501,695                 4,501,695
         Fund shares sold                                     432,878                 60,742                   493,620
         Interest                                          22,385,020             13,734,651                36,119,671
     Other Assets                                             100,602                 66,072                   166,674
- ---------------------------------------------------  ---------------------    ----------------------  ---------------------
         Total assets                                   1,237,547,910            707,327,075             1,944,874,985
- ---------------------------------------------------  ---------------------    ----------------------  ---------------------
Liabilities:
     Payable for:
         Distributions to shareholders                      5,580,264              3,203,076                 8,783,340
         Investments purchased                             10,935,867             12,515,014                23,450,881
         Fund shares redeemed                               7,358,335                875,460                 8,233,795
         Futures variation margin                             111,836                 26,719                   138,555
     Due to related parties                                    56,657                 27,543                    84,200
     Other accrued expenses                                    11,733                 47,073                    58,806
- ---------------------------------------------------  ----------------------   ----------------------  ---------------------
         Total Liabilities                                 24,054,692             16,694,885                40,749,577
- ---------------------------------------------------  ----------------------   ----------------------  ---------------------
     Net assets                                      $  1,213,493,218         $  690,632,190          $  1,904,125,408
- ---------------------------------------------------  ----------------------   ----------------------  ---------------------
Net assets represented by:
     Paid-in capital                                 $  1,206,391,832         $  680,933,549          $  1,887,325,381
     Accumulated distributions in excess of net
         investment income                                 (3,581,343)            (3,255,715)               (6,837,058)
     Accumulated net realized gain (loss) on
         investments and futures contracts                (37,034,132)           (15,665,743)              (52,699,875)
     Net unrealized appreciation (depreciation) on:
         Investments                                       47,385,531             28,620,338                76,005,869
         Future contracts                                     331,330                   (239)                  331,091
- ---------------------------------------------------  ----------------------   ----------------------  ---------------------
     Total net assets applicable to outstanding
         shares of beneficial interest ($7.54,
         $10.50 and $7.54 per share on 160,963,692,
         65,745,122 and 252,559,473 shares
         outstanding, respectively) (b)              $  1,213,493,218         $  690,632,190          $  1,904,125,408
- ---------------------------------------------------  ----------------------   ----------------------  ---------------------
(a)  Identified cost of investments:
         Keystone Tax Free Fund                          $ 1,166,960,872
         Keystone Tax Exempt Trust                           660,241,435
                                                        ----------------
              Total Identified Cost of Investments       $ 1,827,202,307
                                                        ================

(b)  Shares after the merger:
         (KTET net assets/KTFF nav) + (KTFF shares o/s)
              (KTET net assets/KTFF nav)
              $ 690,632,190/ $7.54         =                  91,595,781
              add KTFF shares outstanding                    160,963,692
                                                             -----------
                                                             252,559,473
                                                             ===========
</TABLE>

<PAGE>


KEYSTONE TAX FREE FUND
KEYSTONE TAX EXEMPT TRUST
PROFORMA COMBINING STATEMENT OF ASSETS AND LIABILITIES - 
  DECEMBER 31, 1994 (Unaudited)

<TABLE>
<CAPTION>
                                                          Keystone Tax            Keystone Tax              Pro-forma
                                                           Free Fund              Exempt Trust              Combined
- ---------------------------------------------------  ----------------------   ---------------------   ---------------------
<S>                                                  <C>                      <C>                     <C>             
Assets:
     Investments at market value (a)                 $  1,181,945,518         $  666,230,060          $  1,848,175,578
     Cash                                                     217,202              3,201,152                 3,418,354
     Receivable for:
         Investments sold                                   1,617,183                     --                 1,617,183
         Fund shares sold                                     283,803                385,804                   669,607
         Interest                                          24,738,850             14,350,585                39,089,435
     Other Assets                                             100,602                 70,152                   170,754
- ---------------------------------------------------  ---------------------    ----------------------  ---------------------
         Total assets                                   1,208,903,158            684,237,753             1,893,140,911
- ---------------------------------------------------  ---------------------    ----------------------  ---------------------
Liabilities:
     Payable for:
         Distributions to shareholders                      6,314,436              3,215,706                 9,530,142
         Investments purchased                              1,997,688                     --                 1,997,688
         Fund shares redeemed                               2,777,855              1,243,069                 4,020,924
     Due to related parties                                    58,863                 27,827                    86,690
     Other accrued expenses                                    27,420                 24,753                    52,173
- ---------------------------------------------------  ----------------------   ----------------------  ---------------------
         Total Liabilities                                 11,176,262              4,511,355                15,687,617
- ---------------------------------------------------  ----------------------   ----------------------  ---------------------
     Net assets                                      $  1,197,716,896         $  679,726,398          $  1,877,453,294
- ---------------------------------------------------  ----------------------   ----------------------  ---------------------
Net assets represented by:
     Paid-in capital                                 $  1,264,955,468         $  712,694,828          $  1,977,650,296
     Accumulated distributions in excess of net
         investment income                                 (3,916,731)            (2,585,326)               (6,502,057)
     Accumulated net realized gain (loss) on
         investments and futures contracts                (37,649,351)           (18,309,670)              (55,959,021)
     Net unrealized appreciation (depreciation) on:
         Investments                                      (25,662,490)           (12,073,434)              (37,735,924)
- ---------------------------------------------------  ----------------------   ----------------------  ---------------------
     Total net assets applicable to outstanding
         shares of beneficial interest ($7.10,
         $9.88 and $7.10 per share on 168,806,043,
         68,775,971 and 264,542,155 shares
         outstanding) (b)                               $  1,197,726,896         $  679,726,398          $  1,877,453,294
- ---------------------------------------------------  ----------------------   ----------------------  ---------------------
(a)  Identified cost of investments:
         Keystone Tax Free Fund                          $ 1,207,608,008
         Keystone Tax Exempt Trust                           678,303,494
                                                        ----------------
              Total Identified Cost of Investments       $ 1,885,911,502
                                                        ================

(b)  Shares after the merger:
         (KTET net assets/KTFF nav) + (KTFF shares o/s)
              (KTET net assets/KTFF nav)
              $ 679,726,398/ $7.10         =                  95,736,112
              add KTFF shares outstanding                    168,806,043
                                                             -----------
                                                             264,542,155
                                                             ===========
</TABLE>



<PAGE>





KEYSTONE TAX FREE FUND
KEYSTONE TAX EXEMPT TRUST
PROFORMA COMBINING STATEMENT OF OPERATIONS - 
  SIX MONTHS ENDED JUNE 30, 1995 (Unaudited)


<TABLE>
<CAPTION>
                                          Keystone Tax        Keystone Tax         Pro-forma           Pro-forma
                                           Free Fund          Exempt Trust         Adjustments         Combined
- --------------------------------------  ----------------    ----------------    -----------------  -----------------
<S>                                     <C>                 <C>                 <C>                <C>          
Investment Income:
     Interest                           $   40,026,273      $  22,674,776       $           --     $  62,701,049
- --------------------------------------  -----------------   -----------------   -----------------  ------------------
Expenses:
     Investment management fee and
          administrative services            3,419,122          2,244,655             (427,408)        5,236,369
     Accounting services                         9,919             18,100              (12,019)           16,000
     Trustees' fees and expenses                28,138             32,399              (27,527)           33,010
     Distribution plan expenses              2,222,307          2,063,668                   --         4,285,975
- --------------------------------------  -----------------   -----------------   -----------------  ------------------
         Total expenses                      5,679,486          4,358,822             (466,954)        9,571,354
- --------------------------------------  -----------------   -----------------   -----------------  ------------------
     Net investment income                  34,346,787         18,315,954              466,954        53,129,695
- --------------------------------------  -----------------   -----------------   -----------------  ------------------
Net realized and unrealized gain
     (loss) on investments and
     futures contracts
     Realized gain (loss) on:
         Investments                         3,356,801          3,638,837                   --         6,995,638
         Closed futures contracts           (2,741,582)          (994,910)                  --        (3,736,492)
- --------------------------------------  -----------------   -----------------   -----------------  ------------------
     Net realized gain (loss) on
         investments and futures
         contracts                             615,219          2,643,927                   --         3,259,146

Net change in unrealized appreciation 
    (depreciation) on:
    Investments                             73,057,683         40,693,772                   --       113,751,455
    Closed futures contracts                   321,668               (239)                  --           321,429
- --------------------------------------  -----------------   -----------------   -----------------  ------------------
Net gain (loss) on investments and
     futures contracts                      73,994,570         43,337,460                   --       117,332,030
- --------------------------------------  -----------------   -----------------   -----------------  ------------------
Net increase (decrease) in net assets
     resulting from operations          $  108,341,357      $  61,653,414       $      466,954     $ 170,461,725
- --------------------------------------  -----------------   -----------------   -----------------  ------------------
</TABLE>






<PAGE>




KEYSTONE TAX FREE FUND
KEYSTONE TAX EXEMPT TRUST
PROFORMA COMBINING STATEMENT OF OPERATIONS - 
  YEAR ENDED DECEMBER 31, 1994 (Unaudited)


<TABLE>
<CAPTION>
                                          Keystone Tax        Keystone Tax         Pro-forma           Pro-forma
                                           Free Fund          Exempt Trust         Adjustments         Combined
- --------------------------------------  ----------------    ----------------    -----------------  -----------------
<S>                                     <C>                 <C>                 <C>                <C>          
Investment Income:
     Interest                           $   88,670,484      $  48,171,138       $           --     $ 136,841,622
- --------------------------------------  -----------------   -----------------   -----------------  -----------------
Expenses:
     Investment management fee and
          administrative services            7,970,545          4,883,373           (1,020,531)       11,833,387
     Accounting services                        23,917              4,550                3,533            32,000
     Trustees' fees and expenses                56,308             12,848               (3,156)           66,000
     Distribution plan expenses             13,226,327          7,451,547                   --        20,677,874
- --------------------------------------  -----------------   -----------------   -----------------  -----------------
         Total expenses                     21,277,097         12,352,318           (1,020,154)       32,609,261
- --------------------------------------  -----------------   -----------------   -----------------  -----------------
     Net investment income                  67,393,387         35,818,820            1,020,154       104,232,361
- --------------------------------------  -----------------   -----------------   -----------------  -----------------
Net realized and unrealized gain
     (loss) on investments and
     futures contracts
     Realized gain (loss) on:
         Investments                       (39,550,582)       (17,862,512)                  --       (57,413,094)
         Closed futures contracts            1,701,424          1,001,798                   --         2,703,222
- --------------------------------------  -----------------   -----------------   -----------------  -----------------
     Net realized gain (loss) on
         investments and futures
         contracts                         (37,849,158)       (16,860,714)                  --       (54,709,872)

Net change in unrealized appreciation
    (depreciation) on:
     Investments                          (139,738,811)       (73,738,928)                  --      (213,477,739)
- --------------------------------------  -----------------   -----------------   -----------------  -----------------
Net gain (loss) on investments and
     futures contracts                    (177,587,969)       (90,599,642)                  --      (268,187,611)
- --------------------------------------  -----------------   -----------------   -----------------  -----------------
Net increase (decrease) in net assets
     resulting from operations           ($110,194,582)     ($ 54,780,822)      $    1,020,154     ($163,955,250)
- --------------------------------------  -----------------   -----------------   -----------------  -----------------
</TABLE>




<PAGE>



                            KEYSTONE TAX EXEMPT TRUST
                              PROPOSED MERGER WITH
                             KEYSTONE TAX FREE FUND

                           NOTES TO PRO-FORMA COMBINED
                        FINANCIAL STATEMENTS (UNAUDITED)

1.  Basis of Combination. On October 16, 1995, Keystone Tax Exempt Trust (KTET)
and Keystone Tax Free Fund (KTFF) entered into an Agreement and Plan of
Reorganization whereby, subject to approval by the shareholders of KTET, KTFF
will acquire the assets and assume the liabilities of KTET in exchange for 
shares of KTFF. This merger of the funds will be accounted for by the
pooling-of-interests method of accounting. The pro-forma combined statements of
assets and liabilities reflects the financial position of KTFF and KTET as of
June 30, 1995 and December 31, 1994 as though the merger occurred as of those
dates. The pro-forma combined statements of operations reflects the results of
operations of KTFF and KTET for the six-month period ended June 30, 1995 and 
the year ended December 31, 1994 as though the merger occurred at the beginning
of each period presented.

The pro-forma combined financial statements reflect the estimated expenses of
both funds in carrying out their obligations under the Agreement and Plan of
Reorganization.

2.  Capital Shares. The pro-forma net asset value per share assumes that
91,595,781 and 95,736,112 additional shares of beneficial interest were issued 
in connection with the reorganization of KTET and KTFF as of June 30, 1995 and
December 31, 1994, respectively. The numbers of additional shares of KTFF 
issued were calculated by dividing the net assets of KTET at June 30, 1995
and December 31, 1994 by the net asset value per share of KTFF as of June 30, 
1995 and December 31, 1994 of $7.54 and $7.10, respectively. The pro-forma 
combined number of KTFF shares outstanding of 252,559,473 and 264,542,155 
consists of the 91,595,781 and 95,736,112 shares issuable to KTET in the merger
and the 160,963,692 and 168,806,043 shares of KTFF outstanding at June 30, 1995
and December 31, 1994, respectively.

3.  Pro-forma Operating Expenses. Certain expenses have been adjusted in the
pro-forma combined statements of operations to reflect the estimated expenses of
the combined entity more closely. Pro-forma operating expenses include the 
actual expenses of KTFF and KTET, adjusted for certain items which are factually
supportable. These adjustments relate to management fees and other operating 
expense which have been recomputed using the rates and the combined average net
asset values of the funds existing during the year. The pro-forma combined
expenses are subject to Blue Sky state expense limitations. No adjustment has 
been made for possible limitations during the periods presented.


<PAGE>





                                   EXHIBIT 11
                                  Legal Opinion




<PAGE>







                                                November 20, 1995



Keystone Tax Free Fund
200 Berkeley Street
Boston, MA  02116-5034


Gentlemen:

      I am a Senior Vice President of and General Counsel to Keystone Investment
Management Company (formerly named Keystone Custodian Funds, Inc.), investment
adviser to Keystone Tax Free Fund (the "Fund"), a Massachusetts business trust.
I have been asked to render an opinion with respect to the issuance of certain
shares of beneficial interest, without par value, of the Fund (the "Shares") in
connection with the proposed acquisition by the Fund of substantially all of the
assets of Keystone Tax Exempt Trust (the "Reorganization"). The offering of the
Shares pursuant to the Reorganization is the subject of a certain registration
statement (the "Registration Statement") on Form N-14, which is being filed by
the Fund with the Securities and Exchange Commission under the Securities Act of
1933, as amended.

      I have examined originals, or copies, certified or otherwise identified to
my satisfaction, of such certificates, records and other documents as I have
deemed necessary or appropriate for the purposes of this opinion.

      Based upon the foregoing, I am of the opinion that the Shares, when issued
and sold in accordance with the terms of the Registration Statement, will be
legally issued, fully paid and non-assessable by the Fund.

      I hereby consent to the filing of this opinion as an exhibit to the
Registration Statement.


                                                Sincerely yours,



                                                Rosemary D. Van Antwerp
                                                Senior Vice President and
                                                General Counsel





<PAGE>







                                   EXHIBIT 12
                        Sullivan & Worcester Tax Opinion




<PAGE>
[SULLIVAN & WORCESTER LETTERHEAD]



                                          October 18, 1995




Keystone Tax Exempt Trust
Keystone Tax Free Fund
200 Berkeley Street
Boston, Massachusetts 02116

            Re:   Acquisition of Assets of Keystone Tax Exempt Trust

Ladies and Gentlemen:

      You have asked for our opinion as to certain tax consequences of the
proposed acquisition of assets of Keystone Tax Exempt Trust ("Selling Fund"), a
Massachusetts business trust, by Keystone Tax Free Fund ("Acquiring Fund"), also
a Massachusetts business trust, in exchange for voting shares of Acquiring Fund
(the "Reorganization").

      In rendering our opinion, we have reviewed and relied upon the draft
Prospectus/Proxy Statement dated October 16, 1995 and associated form of
Agreement and Plan of Reorganization (the "Reorganization Agreement") expected
to be filed with the Securities and Exchange Commission on or about October 27,
1995. We have relied, without independent verification, upon the factual
statements made therein, and assume that there will be no change in material
facts disclosed therein between the date of this letter and the date of closing
of the Reorganization. We further assume that the Reorganization will be carried
out in accordance with the Reorganization Agreement. We have also relied upon
the following representations, each of which has been made to us by officers of
Acquiring Fund or of Selling Fund:

      A.    The Reorganization will be consummated substantially as described
in the Reorganization Agreement.

      B. Acquiring Fund will acquire from Selling Fund at least 90% of the fair
market value of the net assets and at least 70% of the fair market value of the
gross assets held by Selling Fund immediately prior to the Reorganization. For
purposes of this representation, assets of Selling Fund used to pay
reorganization expenses, cash retained to pay liabilities, and redemptions and
distributions (except for regular and normal distributions) made by Selling Fund
immediately preceding the transfer which are part of the plan of reorganization,
will be considered as assets held by Selling Fund immediately prior to the
transfer.

      C. To the best of the knowledge of management of Selling Fund, there is no
plan or intention on the part of the shareholders of Selling Fund to sell,
exchange, or otherwise dispose of a number of Acquiring Fund shares received in
the Reorganization that would reduce the former Selling Fund shareholders'
ownership of Acquiring Fund shares to a number of shares having a value, as of
the date of the Reorganization (the "Closing Date"), of less than 50 percent of
the value of all of the formerly outstanding shares of Selling Fund as of the
same date. For purposes of this representation, Selling Fund shares exchanged
for cash or other property will be treated as outstanding Selling Fund shares on
the Closing Date. There are no dissenters' rights in the Reorganization, and no
cash will be exchanged for Selling Fund shares in lieu of fractional shares of
Acquiring Fund. Moreover, shares of Selling Fund and shares of Acquiring Fund
held by Selling Fund shareholders and otherwise sold, redeemed, or disposed of
prior or subsequent to the Reorganization will be considered in making this
representation, except for shares of Selling Fund or Acquiring Fund redeemed in
the ordinary course of business of Selling Fund or Acquiring Fund in accordance
with the requirements of section 22(e) of the Investment Company Act of 1940.

      D. Selling Fund has not redeemed and will not redeem the shares of any of
its shareholders in connection with the Reorganization except to the extent
necessary to comply with its legal obligation to redeem its shares.

      E. The management of Acquiring Fund has no plan or intention to redeem or
reacquire any of the Acquiring Fund shares to be received by Selling Fund
shareholders in connection with the Reorganization, except to the extent
necessary to comply with its legal obligation to redeem its shares.

      F. The management of Acquiring Fund has no plan or intention to sell or
dispose of any of the assets of Selling Fund which will be acquired by Acquiring
Fund in the Reorganization, except for dispositions made in the ordinary course
of business, and to the extent necessary to enable Acquiring Fund to comply with
its legal obligation to redeem its shares.

      G. Following the Reorganization, Acquiring Fund will continue the historic
business of Selling Fund in a substantially unchanged manner as part of the
regulated investment company business of Acquiring Fund, or will use a
significant portion of Selling Fund's historic business assets in a business.

      H.    There is no intercorporate indebtedness between Acquiring Fund
and Selling Fund.

      I. Acquiring Fund does not own, directly or indirectly, and has not owned
in the last five years, directly or indirectly, any shares of Selling Fund.
Acquiring Fund will not acquire any shares of Selling Fund prior to the Closing
Date.

      J. Acquiring Fund will not make any payment of cash or of property other
than shares to Selling Fund or to any shareholder of Selling Fund in connection
with the Reorganization.

      K. Pursuant to the Reorganization Agreement, the shareholders of Selling
Fund will receive solely Acquiring Fund voting shares in exchange for their
voting shares of Selling Fund.

      L. The fair market value of the Acquiring Fund shares to be received by
the Selling Fund shareholders will be approximately equal to the fair market
value of the Selling Fund shares surrendered in exchange therefor.

      M. Subsequent to the transfer of Selling Fund's assets to Acquiring Fund
pursuant to the Reorganization Agreement, Selling Fund will distribute the
shares of Acquiring Fund, together with other assets it may have, in final
liquidation as expeditiously as possible.

      N.    Selling Fund is not under the jurisdiction of a court in a Title
11 or similar case within the meaning of ss. 368(a)(3)(A) of the Internal
Revenue Code of 1986, as amended (the "Code").

      O.    Selling Fund is treated as a corporation for federal income tax
purposes and at all times in its existence has qualified as a regulated
investment company, as defined in ss. 851 of the Code.

      P.    Acquiring Fund is treated as a corporation for federal income tax
purposes and at all times in its existence has qualified as a regulated
investment company, as defined in ss. 851 of the Code.

      Q. The sum of the liabilities of Selling Fund to be assumed by Acquiring
Fund and the expenses of the Reorganization does not exceed twenty percent of
the fair market value of the assets of Selling Fund.

      R.    The foregoing representations are true on the date of this letter
and will be true on the date of closing of the Reorganization.
      Based on and subject to the foregoing, and our examination of the legal
authority we have deemed to be relevant, it is our opinion that for federal
income tax purposes:

      1. The acquisition by Acquiring Fund of substantially all of the assets of
Selling Fund solely in exchange for voting shares of Acquiring Fund followed by
the distribution by Selling Fund of said Acquiring Fund shares to the
shareholders of Selling Fund in exchange for their Selling Fund shares will
constitute a reorganization within the meaning of ss. 368(a)(1)(C) of the Code,
and Acquiring Fund and Selling Fund will each be "a party to a reorganization"
within the meaning of ss. 368(b) of the Code.

      2. No gain or loss will be recognized to Selling Fund upon the transfer of
substantially all of its assets to Acquiring Fund solely in exchange for
Acquiring Fund voting shares and assumption by Acquiring Fund of certain
identified liabilities of Selling Fund, or upon the distribution of such
Acquiring Fund voting shares to the shareholders of Selling Fund in exchange for
all of their Selling Fund shares.

      3. No gain or loss will be recognized by Acquiring Fund upon the receipt
of the assets of Selling Fund (including any cash retained initially by Selling
Fund to pay liabilities but later transferred) solely in exchange for Acquiring
Fund voting shares and assumption by Acquiring Fund of certain identified
liabilities of Selling Fund.

      4. The basis of the assets of Selling Fund acquired by Acquiring Fund will
be the same as the basis of those assets in the hands of Selling Fund
immediately prior to the transfer, and the holding period of the assets of
Selling Fund in the hands of Acquiring Fund will include the period during which
those assets were held by Selling Fund.

      5. The shareholders of Selling Fund will recognize no gain or loss upon
the exchange of all of their Selling Fund shares solely for Acquiring Fund
voting shares. Gain, if any, will be realized by Selling Fund shareholders who
in exchange for their Selling Fund shares receive other property or money in
addition to Acquiring Fund shares, and will be recognized, but not in excess of
the amount of cash and the value of such other property received. If the
exchange has the effect of the distribution of a dividend, then the amount of
gain recognized that is not in excess of the ratable share of undistributed
earnings and profits of Selling Fund will be treated as a dividend.

      6. The basis of the Acquiring Fund voting shares to be received by the
Selling Fund shareholders will be the same as the basis of the Selling Fund
shares surrendered in exchange therefor.
      7. The holding period of the Acquiring Fund voting shares to be received
by the Selling Fund shareholders will include the period during which the
Selling Fund shares surrendered in exchange therefor were held, provided the
Selling Fund shares were held as a capital asset on the date of the exchange.

      This opinion letter is delivered to you in satisfaction of the
requirements of Paragraphs 6.9 and 7.9 of the Reorganization Agreement. We
hereby consent to the filing of this opinion as an exhibit to the Registration
Statement on Form N-14 and to use of our name and any reference to our firm in
the Registration Statement or in the Prospectus/Proxy Statement constituting a
part thereof. In giving such consent, we do not thereby admit that we come
within the category of persons whose consent is required under Section 7 of the
Securities Act of 1933, as amended, or the rules and regulations of the
Securities and Exchange Commission thereunder.

                                    Very truly yours,



                                    SULLIVAN & WORCESTER
                                    A Registered Limited Liability Partnership







TAXEXMPT.OPN



<PAGE>





                                   EXHIBIT 14
                          Independent Auditor's Consent


<PAGE>




                                                                     Exhibit 14




                         CONSENT OF INDEPENDENT AUDITORS




The Trustees
Keystone Tax Exempt Trust
Keystone Tax Free Fund



      We consent to the use of our reports incorporated herein by reference.

                                                          KPMG Peat Marwick LLP

November 20, 1995
Boston, Massachusetts

<PAGE>





                                   EXHIBIT 16
                               Powers of Attorney




<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and/or Chairman of the Board and Chief
Executive Officer and for which Keystone Custodian Funds, Inc. serves as Adviser
or Manager and registering from time to time the shares of such companies, and
generally to do all such things in my name and in my behalf to enable such
investment companies to comply with the provisions of the Securities Act of
1933, as amended, the Investment Company Act of 1940, as amended, and all
requirements and regulations of the Securities and Exchange Commission
thereunder, hereby ratifying and confirming my signature as it may be signed by
my said attorneys to any and all registration statements and amendments thereto.


                                                /s/George S. Bissell
                                                George S. Bissell
                                                Director/Trustee,
                                                Chairman of the Board


Dated: December 14, 1994





<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and/or Chief Executive Officer and for
which Keystone Custodian Funds, Inc. serves as Adviser or Manager and
registering from time to time the shares of such companies, and generally to do
all such things in my name and in my behalf to enable such investment companies
to comply with the provisions of the Securities Act of 1933, as amended, the
Investment Company Act of 1940, as amended, and all requirements and regulations
of the Securities and Exchange Commission thereunder, hereby ratifying and
confirming my signature as it may be signed by my said attorneys to any and all
registration statements and amendments thereto.




                                                /s/ Albert H. Elfner, III
                                                Albert H. Elfner, III
                                                Director/Trustee,
                                                President and Chief 
                                                Executive Officer







<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director, Trustee or officer and for which Keystone
Custodian Funds, Inc. serves as Adviser or Manager and registering from time to
time the shares of such companies, and generally to do all such things in my
name and in my behalf to enable such investment companies to comply with the
provisions of the Securities Act of 1933, as amended, the Investment Company Act
of 1940, as amended, and all requirements and regulations of the Securities and
Exchange Commission thereunder, hereby ratifying and confirming my signature as
it may be signed by my said attorneys to any and all registration statements and
amendments thereto.




                                                /s/ Kevin J. Morrissey 
                                                Kevin J. Morrissey 
                                                Treasurer



Dated: December 14, 1994





<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and for which Keystone Custodian
Funds, Inc. serves as Adviser or Manager and registering from time to time the
shares of such companies, and generally to do all such things in my name and in
my behalf to enable such investment companies to comply with the provisions of
the Securities Act of 1933, as amended, the Investment Company Act of 1940, as
amended, and all requirements and regulations of the Securities and Exchange
Commission thereunder, hereby ratifying and confirming my signature as it may be
signed by my said attorneys to any and all registration statements and
amendments thereto.


                                                /s/ Frederick Amling
                                                Frederick Amling
                                                Director/Trustee


Dated: December 14, 1994





<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and for which Keystone Custodian
Funds, Inc. serves as Adviser or Manager and registering from time to time the
shares of such companies, and generally to do all such things in my name and in
my behalf to enable such investment companies to comply with the provisions of
the Securities Act of 1933, as amended, the Investment Company Act of 1940, as
amended, and all requirements and regulations of the Securities and Exchange
Commission thereunder, hereby ratifying and confirming my signature as it may be
signed by my said attorneys to any and all registration statements and
amendments thereto.



                                                /s/ Charles A. Austin III
                                                Charles A. Austin III
                                                Director/Trustee


Dated: December 14, 1994






<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and for which Keystone Custodian
Funds, Inc. serves as Adviser or Manager and registering from time to time the
shares of such companies, and generally to do all such things in my name and in
my behalf to enable such investment companies to comply with the provisions of
the Securities Act of 1933, as amended, the Investment Company Act of 1940, as
amended, and all requirements and regulations of the Securities and Exchange
Commission thereunder, hereby ratifying and confirming my signature as it may be
signed by my said attorneys to any and all registration statements and
amendments thereto.



                                                /s/ Edwin D. Campbell
                                                Edwin D. Campbell
                                                Director/Trustee


Dated: December 14, 1994





<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and for which Keystone Custodian
Funds, Inc. serves as Adviser or Manager and registering from time to time the
shares of such companies, and generally to do all such things in my name and in
my behalf to enable such investment companies to comply with the provisions of
the Securities Act of 1933, as amended, the Investment Company Act of 1940, as
amended, and all requirements and regulations of the Securities and Exchange
Commission thereunder, hereby ratifying and confirming my signature as it may be
signed by my said attorneys to any and all registration statements and
amendments thereto.



                                                /s/ Charles F. Chapin
                                                Charles F. Chapin
                                                Director/Trustee


Dated: December 14, 1994





<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and for which Keystone Custodian
Funds, Inc. serves as Adviser or Manager and registering from time to time the
shares of such companies, and generally to do all such things in my name and in
my behalf to enable such investment companies to comply with the provisions of
the Securities Act of 1933, as amended, the Investment Company Act of 1940, as
amended, and all requirements and regulations of the Securities and Exchange
Commission thereunder, hereby ratifying and confirming my signature as it may be
signed by my said attorneys to any and all registration statements and
amendments thereto.


                                                /s/ K. Dun Gifford
                                                K. Dun Gifford
                                                Director/Trustee


Dated: December 14, 1994





<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and for which Keystone Custodian
Funds, Inc. serves as Adviser or Manager and registering from time to time the
shares of such companies, and generally to do all such things in my name and in
my behalf to enable such investment companies to comply with the provisions of
the Securities Act of 1933, as amended, the Investment Company Act of 1940, as
amended, and all requirements and regulations of the Securities and Exchange
Commission thereunder, hereby ratifying and confirming my signature as it may be
signed by my said attorneys to any and all registration statements and
amendments thereto.



                                                /s/ Leroy Keith, Jr.
                                                Leroy Keith, Jr.
                                                Director/Trustee


Dated: December 14, 1994




<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and for which Keystone Custodian
Funds, Inc. serves as Adviser or Manager and registering from time to time the
shares of such companies, and generally to do all such things in my name and in
my behalf to enable such investment companies to comply with the provisions of
the Securities Act of 1933, as amended, the Investment Company Act of 1940, as
amended, and all requirements and regulations of the Securities and Exchange
Commission thereunder, hereby ratifying and confirming my signature as it may be
signed by my said attorneys to any and all registration statements and
amendments thereto.


                                                /s/ F. Ray Keyser,Jr.
                                                F. Ray Keyser, Jr.
                                                Director/Trustee


Dated: December 14, 1994





<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and for which Keystone Custodian
Funds, Inc. serves as Adviser or Manager and registering from time to time the
shares of such companies, and generally to do all such things in my name and in
my behalf to enable such investment companies to comply with the provisions of
the Securities Act of 1933, as amended, the Investment Company Act of 1940, as
amended, and all requirements and regulations of the Securities and Exchange
Commission thereunder, hereby ratifying and confirming my signature as it may be
signed by my said attorneys to any and all registration statements and
amendments thereto.



                                                /s/ David M. Richardson
                                                David M. Richardson
                                                Director/Trustee


Dated: December 14, 1994




<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and for which Keystone Custodian
Funds, Inc. serves as Adviser or Manager and registering from time to time the
shares of such companies, and generally to do all such things in my name and in
my behalf to enable such investment companies to comply with the provisions of
the Securities Act of 1933, as amended, the Investment Company Act of 1940, as
amended, and all requirements and regulations of the Securities and Exchange
Commission thereunder, hereby ratifying and confirming my signature as it may be
signed by my said attorneys to any and all registration statements and
amendments thereto.


                                                /s/ Richard J. Shima
                                                Richard J. Shima
                                                Director/Trustee


Dated: December 14, 1994





<PAGE>



                                POWER OF ATTORNEY



      I, the undersigned, hereby constitute Roger T. Wickers, Rosemary D. Van
Antwerp, Jean S. Loewenberg, Dorothy E. Bourassa, James M. Wall and Melina M. T.
Murphy, each of them singly, my true and lawful attorneys, with full power to
them and each of them to sign for me and in my name in the capacity indicated
below any and all registration statements, including, but not limited to, Forms
N-8A, N-8B-1, S-5, N-1 and N-1A, as amended from time to time, and any and all
amendments thereto to be filed with the Securities and Exchange Commission for
the purpose of registering from time to time all investment companies of which I
am now or hereafter a Director or Trustee and for which Keystone Custodian
Funds, Inc. serves as Adviser or Manager and registering from time to time the
shares of such companies, and generally to do all such things in my name and in
my behalf to enable such investment companies to comply with the provisions of
the Securities Act of 1933, as amended, the Investment Company Act of 1940, as
amended, and all requirements and regulations of the Securities and Exchange
Commission thereunder, hereby ratifying and confirming my signature as it may be
signed by my said attorneys to any and all registration statements and
amendments thereto.


                                                /s/ Andrew J. Simons
                                                Andrew J. Simons
                                                Director/Trustee


Dated: December 14, 1994







<PAGE>





                                  EXHIBIT 17(a)
                                  24f-2 Notice




<PAGE>


As filed with the Securities and Exchange Commission April 28, 1995.

                                                       File Nos.  2-58699
                                                             and 811-2740

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM N-1A


REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933          ----

Pre-Effective Amendment No.                                      ----
Post-Effective Amendment No.   26                                  X
                              ----                               ----
                                       and

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940

Amendment No.                        25                                  X
                                    ----                               ----

                             KEYSTONE TAX FREE FUND
                             ----------------------
               (Exact name of Registrant as specified in Charter)

               200 Berkeley Street, Boston, Massachusetts 02116-5034
               -----------------------------------------------------
                (Address of Principal Executive Offices) (Zip Code)

                Registrant's Telephone Number, including Area Code:
                ---------------------------------------------------
                                   (617) 338-3677

                Rosemary D. Van Antwerp, Esq., 200 Berkeley Street,
                ---------------------------------------------------
                              Boston, MA 02116-5034
                              ---------------------
                      Name and Address of Agent for Service


It is proposed that this filing will become effective:

 X   immediately upon filing pursuant to paragraph (b) of Rule 485
- ---

- ---  on (date) pursuant to paragraph (b) of Rule 485

- ---  60 days after filing pursuant to paragraph (a)(i) of Rule 485

- ---  on (date) pursuant to paragraph (a)(i) of Rule 485

- ---  75 days after filing pursuant to paragraph (a)(ii) of Rule 485

- ---  on (date) pursuant to paragraph (a)(ii) of Rule 485

The Registrant has filed a Declaration pursuant to Rule 24f-2 under the
Investment Company Act of 1940. A Rule 24f-2 Notice for Registrant's last fiscal
year was filed on January 27, 1995.



<PAGE>





                                                January 25, 1995



Keystone Tax Free Fund
200 Berkeley Street
Boston, Massachusetts  02116-5034


Re:   Notice Pursuant to Rule 24f-2 under the Investment
      Company Act of 1940 (the "1940 Act")
      --------------------------------------------------


Gentlemen:

     I am a Senior Vice President of and General Counsel to Keystone Custodian
Funds, Inc., investment adviser to Keystone Tax Free Fund (the "Fund"). You have
asked for my opinion with respect to the issuance of 16,411,521 additional
shares of the Fund under the Fund's Declaration of Trust, as amended
("Declaration of Trust"), and pursuant to the Fund's indefinite registration of
such shares under Rule 24f-2 under the 1940 Act. The Fund is filing its Rule
24f-2 Notice to which this opinion is appended to make the issuance of such
shares definite in number for its fiscal year ended December 31, 1994.

      To my knowledge, a Prospectus is on file with the Securities and Exchange
Commission as part of Post-Effective Amendment No. 24 to the Fund's Registration
Statement covering the public offering and sale of the Fund's shares for the
period during which such shares were issued.

      In my opinion, such shares, if issued and sold in accordance with the
Fund's Declaration of Trust, By-Laws, as amended ("By-Laws"), and offering
Prospectus, were legally issued, fully paid, and nonassessable by the Fund,
entitling the holders thereof to the rights set forth in the Declaration of
Trust and By-Laws and subject to the limitations stated therein.

  My opinion is based upon my examination of the Declaration of Trust; a review
of the minutes of the Fund's Board of Trustees authorizing the registration of
shares pursuant to Rule 24f-2 under the 1940 Act and the issuance of such
additional shares; and the Fund's Prospectus. In my examination of such
documents, I have assumed the genuineness of all signatures and the conformity
of copies to originals.




<PAGE>





Securities and Exchange Commission
January 25, 1995
Page 2



      I hereby consent to the use of this opinion in connection with the Fund's
Rule 24f-2 Notice making definite the number of such additional shares issued.


                                                Sincerely yours,



                                                Rosemary D. Van Antwerp
                                                Senior Vice President and
                                                General Counsel





<PAGE>





                                  EXHIBIT 17(b)
                                   Proxy Card




<PAGE>



                            KEYSTONE TAX EXEMPT TRUST


                      PROXY FOR THE MEETING OF SHAREHOLDERS
                         TO BE HELD ON FEBRUARY 20, 1996




      The undersigned, revoking all Proxies heretofore given, hereby appoints
Albert H. Elfner, III, Rosemary D. Van Antwerp and Melina M.T. Murphy or any of
them as Proxies of the undersigned, with full power of substitution, to vote on
behalf of the undersigned all shares of Keystone Tax Exempt Trust ("KTET") that
the undersigned is entitled to vote at the meeting of shareholders of KTET to be
held at 2:00 p.m. on Tuesday, February 20, 1996 at the offices of Keystone
Investment Management Company, 26th Floor, 200 Berkeley Street, Boston,
Massachusetts 02116 and at any adjournments thereof, as fully as the undersigned
would be entitled to vote if personally present, as follows:


      To approve an Agreement and Plan of Reorganization whereby Keystone Tax
Free Fund ("KTFF") will acquire all of the assets of KTET in exchange for Shares
of KTFF and will assume the liabilities of KTET, as described in the
accompanying Prospectus/Proxy Statement.


____________ FOR    ___________ AGAINST      ___________ ABSTAIN





<PAGE>





PROXY SOLICITED ON BEHALF OF THE BOARD OF TRUSTEES OF KTET.

THE BOARD OF TRUSTEES OF KTET RECOMMENDS A VOTE FOR THE PROPOSAL.

THE SHARES REPRESENTED HEREBY WILL BE VOTED AS INDICATED OR FOR THE PROPOSAL IF
NO CHOICE IS INDICATED.

THE PROXIES ARE AUTHORIZED IN THEIR DISCRETION TO VOTE UPON SUCH OTHER MATTERS
AS MAY COME BEFORE THE MEETING OR ANY ADJOURNMENTS THEREOF.



                          NOTE: PLEASE SIGN EXACTLY AS YOUR
                          NAME(S) APPEAR ON THIS CARD.


                          Dated: ____________________, 1996



                          Signature(s):_______________________________


                          Signature (of joint
                          owner, if any):_____________________________



NOTE: When signing as attorney, executor, administrator, trustee, guardian, or
as custodian for a minor, please sign your name and give your full title as
such. If signing on behalf of a corporation, please sign full corporate name and
your name and indicate your title. If you are a partner signing for a
partnership, please sign the partnership name and your name. Joint owners should
each sign this proxy. Please sign, date and return.



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