; or (B) have been otherwise appropriated under Federal law, including the Gulf of Mexico Energy Security Act of 2006 ( 43 U.S.C. 1331 note; Public Law 109–432 ), the Mineral Leasing Act ( 30 U.S.C. 181 et seq.), and chapter 2003 of title 54, United States Code. (c) Availability of funds Amounts deposited in the Fund shall be available to the Service without further appropriation or fiscal year limitation. (d) Investment of amounts (1) In general The Secretary may request the Secretary of the Treasury to invest any portion of the Fund that is not, as determined by the Secretary, required to meet the current needs of the Fund. (2) Requirement An investment requested under paragraph (1) shall be made by the Secretary of the Treasury in a public debt security— (A) with a maturity suitable to the needs of the Fund, as determined by the Secretary; and (B) bearing interest at a rate determined by the Secretary of the Treasury, taking into consideration current market yields on outstanding marketable obligations of the United States of comparable maturity. (3) Credits to fund The income on investments of the Fund under this subsection shall be credited to, and form a part of, the Fund. (e) Use of funds Amounts in the Fund shall be used for the high-priority deferred maintenance needs of the Service, as determined by the Director, as follows: (1) 65 percent of amounts in the Fund shall be allocated for projects that are not eligible for the funding described in subparagraph (A) or (B) of paragraph (2) for the repair and rehabilitation of assets, including— (A) historic structures, facilities, and other historic assets; (B) nonhistoric assets that relate directly to visitor— (i) access, including making facilities accessible to visitors with disabilities; (ii) health and safety; and (iii) recreation