Exhibit a (vii) under Form N-1A
                                            Exhibit 3(i) under Item 601/Reg. S-K



                   FEDERATED MUNICIPAL SECURITIES INCOME TRUST

                                Amendment No. 24

                              DECLARATION OF TRUST

                             As dated August 6, 1990

        This Declaration of Trust is amended as follows:

        Strike the first paragraph of Section 5 of Article III from the
Declaration of Trust and substitute in its place the following:

         "Section 5. Establishment and Designation of Series or Class. Without
         limiting the authority of the Trustees set forth in Article XII,
         Section 8, inter alia, to establish and designate any additional Series
         or Class or to modify the rights and preferences of any existing Series
         or Class, the Series and Classes of the Trust are established and
         designated as:

                   Federated California Municipal Income Fund
                                 Class A Shares
                                 Class B Shares
                 Federated Michigan Intermediate Municipal Trust
                                 Class A Shares
                  Federated Municipal High Yield Advantage Fund
                                 Class A Shares
                                 Class B Shares
                                 Class C Shares
                                 Class F Shares
                    Federated New York Municipal Income Fund
                                 Class A Shares
                                 Class B Shares
                 Federated North Carolina Municipal Income Fund
                                 Class A Shares
                      Federated Ohio Municipal Income Fund
                                 Class F Shares
                  Federated Pennsylvania Municipal Income Fund
                                 Class A Shares
                                 Class B Shares"


         The undersigned hereby certify that the above stated Amendment is a
true and correct Amendment to the Declaration of Trust, as adopted by the Board
of Trustees at a meeting on the day of May, 2007.






         WITNESS the due execution hereof this                 day of May, 2007.
                                               ---------------




John F. Donahue                                      Peter E. Madden

                                                     .
Thomas G. Bigley                                     Charles F. Mansfield, Jr.


John T. Conroy, Jr.                                  John E. Murray, Jr.


Nicholas P. Constantakis                             Thomas M. O'Neill


John F. Cunningham                                   Marjorie P. Smuts


J. Christopher Donahue                               John S. Walsh


Lawrence D. Ellis, M.D.                              James F. Will