Exhibit (g)(3)

State Street Navigator Securities Lending Trust
c/o State Street Bank and Trust Company
4 Copley Place, 5^th Floor
Boston, MA 02116

April 9, 2009

State Street Bank and Trust Company
One Lincoln Street
Boston, MA 02111-2900

Attention: Joseph C. Antonellis, Vice Chairman

          Re: State Street Navigator Securities Lending Trust(the “Fund”)

Ladies and Gentlemen:

Please be advised that the Fund has established a new series of shares to be known as PSF Portfolio.

In accordance with Section 18, the Additional Funds provision, of the Custodian Contract dated as of March 4, 1996, as amended, by and among the Fund and State Street Bank and Trust Company, the undersigned Fund hereby requests that your bank act as Custodian for the Fund under the terms of the aforementioned contract. In connection with such request, the undersigned Fund hereby confirms to you, as of the date hereof, its representations and warranties set forth in the aforementioned contract.

Kindly indicate your acceptance of the foregoing by executing two copies of this letter agreement, returning one to the Fund and retaining one for your records. Thank you.

Sincerely,


STATE STREET NAVIGATOR SECURITIES
LENDING TRUST
     on behalf of:
     PSF PORTFOLIO
 

By: Name:	/s/ Nancy L. Conlin Nancy L. Conlin
Title:	Secretary, Duly Authorized

Agreed and Accepted:

STATE STREET BANK AND TRUST COMPANY

By: Name:	/s/ Joseph C. Antonellis Joseph C. Antonellis
Title:	Vice Chairman, Duly Authorized
Effective Date: July 1, 2009