; availability of funds (A) Authorization of appropriations There is authorized to be appropriated to the Fund $250,000,000 for each of fiscal years 2018 and 2019. (B) Credits In addition to any funds otherwise appropriated, the Fund shall be credited with all reimbursements, advances, or refunds or recoveries relating to information technology or services provided through the Fund. (C) Availability of funds Amounts deposited, credited, or otherwise made available to the Fund shall be available, as provided in appropriations Acts, until expended for the purposes described in paragraph (3). (5) Reimbursement (A) Payment by agency For a product or service developed under paragraph (3)(B), including any services or work performed in support of such development under paragraph (3)(C), the head of an agency that uses such product or service shall pay an amount fixed by the Commissioner in accordance with this paragraph. (B) Reimbursement by agency The head of an agency shall reimburse the Fund for any transfer made under paragraph (3)(A), including any services or work performed in support of such transfer under paragraph (3)(C), in accordance with the terms established in a written agreement described in paragraph (6). Notwithstanding any other provision of law, an agency may make a reimbursement required by this subparagraph from any appropriation made available subsequent to the date of the enactment of this Act for information technology activities, consistent with any applicable reprogramming law or guidelines of the Committees on Appropriations of the House of Representatives and the Senate. An obligation to make a payment under a written agreement described in paragraph (6) in a fiscal year after the date of the enactment of this Act shall be recorded pursuant to section 1501 of title 31, United States Code, in the fiscal year in which the payment is due. (C) Prices fixed by Commissioner The Commissioner, in consultation with the Director, shall establish amounts to be paid by an agency and terms of repayment