authority during such school year shall not be used to calculate whether such school food authority meets the requirements under clause (i). (iii) Updated list Not later than 6 months after the date of the enactment of this subparagraph, and every 2 years thereafter, the Secretary shall make available to school food authorities a list of domestically unavailable products. . (b) Application The amendment made by subsection (a) shall apply to school food authorities beginning on the first day of the first school year that begins after the date of the enactment of this Act. 4306. Reauthorization of the Gus Schumacher Nutrition Incentive program Section 4405 of the Food, Conservation, and Energy Act of 2008 ( 7 U.S.C. 7517 ) is amended— (1) in subsection (b)— (A) in paragraph (1), by amending subparagraph (C) to read as follows: (C) Federal share (i) In general Except as provided in clause (ii) and subparagraph (D)(iii), the Federal share of the cost of carrying out an activity under this subsection shall not exceed 50 percent of the total cost of the activity. (ii) Waiver for persistent poverty counties The Secretary may waive the application of clause (i) in the case of an activity carried out in a county that, during the preceding 30-year period has had a population of which greater than or equal to 20 percent of such population are living in poverty (as measured by the most recent decennial censuses).