; and (C) from fees collected under section 22.1 of title 22, Code of Federal Regulations, for visa applications submitted by nonimmigrants seeking temporary admission to the United States for businesses or pleasure under section 101(a)(15)(B) of the Immigration and Nationality Act ( 8 U.S.C. 1101(a)(15)(B) ) (commonly referred to as B–1 and B–2 visas), $25 per application, adjusted annually for inflation. (2) Increase in park entrance fees (A) In general Not later than June 1, 2020, the Secretary of the Interior shall increase each entrance fee (as defined in section 802 of the Federal Lands Recreation Enhancement Act ( 16 U.S.C. 6801 )) established for a unit of the National Park System under section 803(e) of that Act ( 16 U.S.C. 6802(e) ) by $5. (B) Adjustments for inflation The Secretary of the Interior shall annually adjust the increase in the amount of each entrance fee required under subparagraph (A) for inflation. (d) Availability of funds Amounts deposited in the Fund shall be available to the Secretary without further appropriation or fiscal year limitation. (e) 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