Exhibit (a)(9) under Form N-1A

Exhibit 3(i) under Item 601/Reg. S-K

AMENDMENT #17

TO THE RESTATED AND AMENDED

DECLARATION OF TRUST

FEDERATED INCOME SECURITIES TRUST

Dated May 19, 2000

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 Capital Income Fund

Class A Shares

Class B Shares

Class C Shares

Class F Shares

Federated Fund for U. S. Government Securities

Class A Shares

Class B Shares

Class C Shares

Federated Intermediate Corporate Bond Fund

Institutional Service Shares

Institutional Shares

Federated Muni and Stock Advantage Fund

Class A Shares

Class B Shares

Class C Shares

Class F Shares

Federated Prudent Global Income Fund

Class A Shares

Class C Shares

Institutional Shares

Federated Real Return Bond Fund

Class A Shares

Class C Shares

Institutional Shares

Federated Short-Term Income Fund

Class A Shares

Class Y Shares

Institutional Service Shares

Institutional Shares

Federated Stock and California Muni Fund

Class A Shares

Class C 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 15th day of August, 2008.

WITNESS the due execution hereof this 15th day of August, 2008.

/s/ John F. Donahue /s/ Charles F. Mansfield, Jr.

John F. Donahue                                                   Charles F. Mansfield, Jr.

/s/ Thomas G. Bigley                                             s/ John E. Murray                                                      

Thomas G. Bigley                                                   John E. Murray, Jr.

/s/ John T. Conroy, Jr.                                           s/ R. James Nicholson                                                      

John T. Conroy, Jr.                                                 R. James Nicholson

/s/ Nicholas P. Constantakis                                 /s/ Thomas M. O’Neill                                                      

Nicholas P. Constantakis                                       Thomas M. O’Neill

/s/ John F. Cunninghan                                          /s/ Marjorie P. Smuts                                                      

John F. Cunningham                                               Marjorie P. Smuts

/s/ J. Christopher Donahue                                    /s/ John S. Walsh                                                      

J. Christopher Donahue                                          John S. Walsh

/s/ Peter E. Madden                                                 /s/ James F. Will                                                      

Peter E. Madden                                                       James F. Will