donation activity under this section. (h) Supplemental reimbursements (1) In general The Secretary may make a supplemental reimbursement to an eligible dairy organization for an approved donation and distribution plan in accordance with the milk donation program established under section 1431 of the Agricultural Act of 2014 ( 7 U.S.C. 9071 ). (2) Reimbursement calculation A supplemental reimbursement described in paragraph (1) shall be equal to the value of— (A) raw milk cost for the product as priced in the Federal milk marketing orders, less any reimbursement provided under section 1431 of the Agricultural Act of 2014, multiplied by (B) the volume of eligible dairy products under such approved donation plan. (i) Funding Out of any amounts of the Treasury not otherwise appropriated, there is appropriated to carry out this section $500,000,000, to remain available until expended. (j) Authority to carry out section The Secretary may only carry out this section during a period in which— (1) a public health emergency is— (A) declared under section 319 of the Public Health Services Act ( 42 U.S.C. 247d )