; and (B) with respect to any such authority, providing the citation to the statute, the list of departments or agencies covered, an explanation of when such authority may be used, and an explanation on any use of such authority in the preceding 3 fiscal years. . 515. Authorizing cancellations in indefinite accounts by appropriation (a) In general Subchapter IV of chapter 15 of title 31, United States Code, is amended by inserting after section 1555 the following: 1555a. Cancellation of appropriations available for indefinite periods within an account Any remaining balance (whether obligated or unobligated) from an appropriation available for an indefinite period in an appropriation account available for an indefinite period that does not meet the requirements for closure under section 1555 shall be canceled, and thereafter shall not be available for obligation or expenditure for any purpose, if— (1) the head of the agency concerned or the President determines that the purposes for which the appropriation was made have been carried out