; and (B) issue additional extensions of not more than 1 year upon the expiration of an extension issued pursuant to subparagraph (A) or this subparagraph. (3) Rule of statutory construction Nothing in this subsection shall be construed to authorize the Administrator or a State delegated authority under subsection (c) to establish a period of performance shorter than the period of performance described in paragraph (1). . 3. Emergency management performance grants program Section 662(c) of the Post-Katrina Emergency Management Reform Act of 2006 ( 6 U.S.C. 762 ) is amended by striking 50 percent and inserting 85 percent . 4. GAO report to Congress on challenges under public assistance alternative procedures (a) In general The Comptroller General of the United States shall conduct a study on the challenges to States and Territories of the United States in obtaining assistance under section 428 of the Robert T. Stafford Disaster Relief and Emergency Assistance Act ( 42 U.S.C. 5189f ). (b) Contents In conducting the study described in subsection (a), the Comptroller General shall study the challenges for assistance described in subsection (a) faced by the following: (1) Rural areas, as such term is defined in section 423 of the Robert T. Stafford Disaster Relief and Emergency Assistance Act ( 42 U.S.C. 5189a ). (2) Small impoverished communities, as such term is defined in section 203 of such Act. (3) Other communities, areas, or individuals that the Comptroller General determines pertinent. (c) Report to Congress Not later than 1 year after the date of enactment of this Act, the Comptroller General shall submit to Congress a report describing the results of the study required under subsection (a).