; and (2) to make available all amounts for obligation, without precondition or limitation (including footnotes) that shall be met prior to obligation, not later than 90 days before the expiration of the period of availability of such appropriation, including, if applicable, 90 days before the expiration of an initial period of availability for which such appropriation was provided. . (b) Clerical amendment The table of contents of the Congressional Budget and Impoundment Control Act of 1974 set forth in section 1(b) of such Act is amended by adding after the item relating to section 1017 the following: 1018. Prudent obligation of budget authority and specific requirements for expiring budget authority. . 502. Strengthening congressional review (a) In general The Impoundment Control Act of 1974 ( 2 U.S.C. 681 et seq.), as amended by section 501(a), is further amended by adding at the end the following: 1019. Reporting (a) Apportionment of appropriations (1) In general Not later than 90 days after the date of enactment of this section, the Office of Management and Budget shall complete implementation of an automated system to post each document apportioning an appropriation, pursuant to section 1513(b) of title 31, United States Code, including any associated footnotes, in a format that qualifies each such document as an Open Government Data Asset (as defined in section 3502 of title 44, United States Code), not later than 2 business days after the date of approval of such apportionment, and shall place on such website each document apportioning an appropriation, pursuant to such section 1513(b), including any associated footnotes, already approved for the fiscal year, and shall report the date of completion of such requirements to the Committees on the Budget and Appropriations of the House of Representatives and Senate. (2) Explanatory statement Each document apportioning an appropriation posted on a publicly accessible website under paragraph (1) shall also include a written explanation by the official