To amend the Energy Policy Act of 2005 to include American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, Puerto Rico, and the Virgin Islands in certain efforts to reduce diesel emissions.

Amends the Energy Policy Act of 2005 to: (1) require the Administrator of the Environmental Protection Agency (EPA) to allocate to each qualified state an amount equal to 1/56 (currently 1/53) of the funds made available for that fiscal year for distribution to states under the grant and loan program for diesel emission reductions; (2) revoke the requirement that Guam, the United States Virgin Islands, American Samoa, and the Commonwealth of the Northern Mariana Islands shall collectively receive an allocation equal to 1/53 of the funds made available for states under such program; and (3) authorize funds that are not claimed by a grantee or loan recipient under such program to be reallocated to such territories.