; and (B) any additional administrative expenses incurred by the State by reason of such agreement (as determined by the Secretary). (2) Terms of payments Payments made to a State under paragraph (1) shall be payable by way of reimbursement in such amounts as the Secretary estimates the State will be entitled to receive under this section for each calendar month, reduced or increased, as the case may be, by any amount by which the Secretary finds that the Secretary’s estimates for any prior calendar month were greater or less than the amounts which should have been paid to the State. Such estimates may be made on the basis of such statistical, sampling, or other method as may be agreed upon by the Secretary and the State agency of the State involved. (3) Funding There are appropriated, out of moneys in the Treasury not otherwise appropriated, such sums as may be necessary for purposes of carrying out this section. (4) Certifications The Secretary shall from time to time certify to the Secretary of the Treasury for payment to each State the sums payable to such State under this section. (d) Applicability during a public health emergency and for 1 year after the end of such emergency (1) In general Subject to paragraph (2), after an agreement is entered into under this section, such agreement shall apply, with respect to an area, to weeks of unemployment— (A) beginning on or after the date of the declaration of a public health emergency for the area