To amend the Digital Television Transition and Public Safety Act of 2005 to extend the interoperable emergency communications grant program through fiscal year 2012.

Amends the Digital Television Transition and Public Safety Act of 2005 to extend through FY2012 (under current law, through FY2010) the requirement that the Assistant Secretary for Communications and Information of the Department of Commerce make payments from the Digital Television Transition and Public Safety Fund for a grant program to assist public safety agencies in the the acquisition of, deployment of, or training for the use of interoperable communications equipment that utilizes reallocated public safety spectrum for radio communication.

Allows the Assistant Secretary to extend, on a case-by-case basis, the period of performance for any investment approved under the program for a period not to exceed two years.