; and (B) specify the estimated amount required to cover additional costs resulting from such change in the terms. (2) Amount Upon receipt of a request for equitable adjustment from a small business concern under paragraph (1), the agency shall provide to such concern an interim partial payment in an amount equal to not less than 50 percent of the estimated amount under paragraph (1)(B). (3) Limitation Any interim partial payment made under this section may not be deemed to be an action to definitize the request for an equitable adjustment. (4) Flow-down of interim partial payment amounts A small business concern that receives an equitable adjustment under this subsection shall pay to a first tier subcontractor of such concern the portion of each interim partial payment received that is attributable to the increased costs of performance incurred by such subcontractor due to the change in the terms of the contract performance described in paragraph (1). A first tier subcontractor that receives a portion of an interim partial payment under this section shall pay to a subcontractor (at any tier) the appropriate portion of such payment. . (b) Implementation The Administrator of the Small Business Administration shall implement the requirements of this section not later than the earlier of the following dates: (1) The first day of the first full fiscal year beginning after the date of the enactment of this Act. (2) October 1, 2025.