; and (ii) a written end-product recycling plan that provides for the beneficial use of the material resulting from any anaerobic digestion food waste-to-energy operation with respect to which the loan or grant is made, in a manner that meets all applicable Federal, State, and local laws that protect human health and the environment. (2) Limitation A grant under subsection (a) may not be used for an anaerobic digester that uses solely manure as undigested biomass. (3) Preference The Administrator shall give preference to grants under subsection (a) for anaerobic digesters that use primarily nonedible food, crop waste, or nonedible food and crop waste as undigested biomass. (c) Authorization of appropriations There is authorized to be appropriated to carry out this section $100,000,000 for each fiscal year. . (b) Clerical amendment The table of contents for the Solid Waste Disposal Act ( 42 U.S.C. 6901 et seq.) is amended by inserting after the item relating to section 7010 the following: Sec. 7011. Grants for composting and anaerobic digestion food waste-to-energy projects. . 505. Government Accountability Office audit (a) In general Not later than 2 years after the date of enactment of this Act, the Comptroller General of the United States (referred to in this section as the Comptroller General ) shall conduct an audit to assess estimates of postharvest food loss and waste in the United States, including estimates by the Department of Agriculture and other government, academic, and industry stakeholders. (b) Requirements The Comptroller General, as part of the audit conducted under subsection (a)— (1) shall— (A) assess the extent to which the estimates described in that subsection provide a valid benchmark for the amount and value of postharvest food loss and waste in the United States; (B) evaluate the reliability of the data, and the validity and accuracy of the assumptions and models, underlying the estimates; and (C) if appropriate, include recommendations to improve the estimates