Exhibit (a)(21)

                          FORM OF JANUS INVESTMENT FUND

  CERTIFICATE OF ESTABLISHMENT, DESIGNATION AND REDESIGNATION OF SHARE CLASSES

      The undersigned, being the Secretary of Janus Investment Fund, a
Massachusetts business trust with transferable shares (the "Trust"), being duly
authorized by vote of a Majority of the duly elected and qualified Trustees of
the Trust acting pursuant to Section 3.6 and Section 4.1 of the Trust's Amended
and Restated Agreement and Declaration of Trust dated March 18, 2003, as further
amended from time to time (the "Declaration") in which the Board of Trustees
approved (1) the redesignation of the initial share class of series of the
Trust, and the Investor Shares of Perkins Mid Cap Value Fund, Perkins Small Cap
Value Fund, Janus Money Market Fund and Janus Government Money Market Fund as
"Class J Shares"; (2) the redesignation of the Institutional Shares of Perkins
Mid Cap Value Fund and Perkins Small Cap Value Fund as "Class L Shares"; and (3)
the establishment and designation of Class A, Class C, Class I, Class R and
Class S shares, as applicable, as separate share classes to certain other
existing series of the Trust, does hereby establish and designate or redesignate
and divide the issued and/or unissued shares of each series of the Trust as the
following share classes for each of the separate series, such that each existing
series will consist of the following classes of shares as listed below (each, a
"Class" and together, the "Classes") to be effective on or about July 1, 2009:


SERIES OF THE TRUST                                            SHARE CLASSES

INTECH Risk-Managed Core Fund                                  Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class S Shares

Janus Balanced Fund                                            Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

Janus Contrarian Fund                                          Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares


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Janus Enterprise Fund                                          Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

Janus Flexible Bond Fund                                       Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

Janus Fund                                                     Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

Janus Global Life Sciences Fund                                Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class S Shares

Janus Global Opportunities Fund                                Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class S Shares

Janus Global Research Fund                                     Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class S Shares

Janus Global Technology Fund                                   Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class S Shares

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Janus Government Money Market Fund                             Class J Shares

Janus Growth and Income Fund                                   Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

Janus High-Yield Fund                                          Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

Janus Money Market Fund                                        Class J Shares

Janus Orion Fund                                               Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

Janus Overseas Fund                                            Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

Janus Research Core Fund                                       Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

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Janus Research Fund                                            Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class S Shares

Janus Smart Portfolio - Conservative                           Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class S Shares

Janus Smart Portfolio - Growth                                 Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class S Shares

Janus Smart Portfolio - Moderate                               Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class S Shares

Janus Short-Term Bond Fund                                     Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class S Shares

Janus Triton Fund                                              Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

Janus Twenty Fund                                              Class J Shares

Janus Venture Fund                                             Class J Shares

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Janus Worldwide Fund                                           Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class R Shares
                                                               Class S Shares

Perkins Mid Cap Value Fund                                     Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class L Shares
                                                               Class R Shares
                                                               Class S Shares

Perkins Small Cap Value Fund                                   Class A Shares
                                                               Class C Shares
                                                               Class I Shares
                                                               Class J Shares
                                                               Class L Shares
                                                               Class R Shares
                                                               Class S Shares

The assets of the Trust shall be divided, having the relative rights and
preferences as follows:

1. The beneficial interest in each of the Funds shall be represented by a
separate series of shares of beneficial interest, par value one cent ($.01) per
share (the "Shares"), consisting of separate Classes. The Series shall bear the
name of each Fund to which it relates and shall represent the beneficial
interest only in such Fund. An unlimited number of Shares of such Series may be
issued.

2. Each Fund shall be authorized to invest in cash, securities, instruments and
other property as from time to time described in the Trust's then effective
registration statement under the Securities Act of 1933 and the Investment
Company Act of 1940, as amended (the "1940 Act").

3. The Shares of each Class of each Fund shall have the additional relative
rights and preferences, shall be subject to the liabilities, shall have the
other characteristics, and shall be subject to other powers of the Trustees, all
as set forth in paragraphs (a) through (m) of Section 4.2 of the Declaration.
Without limitation of the foregoing sentence and as described in subsection (e)
of Section 4.2 of the Declaration, each Share of such series shall be
redeemable, shall be entitled to one vote, or a ratable fraction of one vote in
respect of a fractional share, as to matters on which Shares of such series, or
such Class as the case may be, shall be entitled to vote, and shall represent a
share of the beneficial interest in the assets of the respective Fund, all as
provided in the Declaration.

                                     - 5 -


4. Liabilities, expenses, costs, charges or reserves that should be properly
allocated to the Shares of a particular Class of a New Fund may, pursuant to a
Plan adopted by the Trustees pursuant to Rule 18f-3 under the 1940 Act, or such
similar rule or provision or interpretation of the 1940 Act, be charged to and
borne solely by such Class, and the bearing of expenses solely by a Class of
Shares may be appropriately reflected and cause differences in net asset value
attributable to, and the dividend, redemption and liquidation rights of, the
Shares of different Classes.

5. Subject to the provisions and limitations of Section 7.3 of the Declaration
and applicable law, this Certificate of Designation may be amended by an
instrument in writing signed by a Majority of the Trustees (or by an officer of
the Trust pursuant to the vote of a Majority of the Trustees), provided that, if
any amendment materially adversely affects the rights of the Shareholders of the
applicable New Fund, or a particular Class of the respective Fund, such
amendment may be adopted by an instrument in writing signed by a Majority of the
Trustees (or by an officer of the Trust pursuant to the vote of a Majority of
the Trustees) when authorized to do so by the vote in accordance with
subsection (e) of Section 4.2 of the Declaration of the holders of a majority of
all the Shares of the respective Fund, or the particular Class of the respective
Fund, outstanding and entitled to vote.

6. All capitalized terms which are not defined herein shall have the same
meanings as are assigned to those terms in the Declaration filed with the
Secretary of State of The Commonwealth of Massachusetts.

   IN WITNESS WHEREOF, the undersigned has set her hand and seal this 17th day
of June, 2009.


                                ------------------------------------------------
                                Stephanie Grauerholz-Lofton, Secretary

                                     - 6 -


STATE OF COLORADO           )
                            ) ss.
CITY AND COUNTY OF DENVER   )

      BEFORE ME, the undersigned authority, on this day personally appeared
Stephanie Grauerholz-Lofton, Secretary of Janus Investment Fund, who, being by
me first duly sworn, stated on her oath that the foregoing document is true and
correct and that she executed the same for the purposes and consideration
therein expressed and in the capacity therein stated.

      GIVEN UNDER MY HAND AND SEAL OF OFFICE this 17th day of June, 2009.



My Commission Expires:                  ---------------------------------------
06/08/2011                              Lynn D. Williams, Notary Public

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