; 132 Stat. 1995) is amended by striking March 1, 2020 and inserting December 31, 2020 . (b) Calendar year 2020 funding Of the amount authorized to be appropriated for fiscal year 2020 for the Department of Defense by this Act, $3,000,000 shall be available for the National Commission on Aviation Safety under section 1087 of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 in calendar year 2020. XI Civilian Personnel Matters 1101. Modification of temporary assignments of Department of Defense employees to a private-sector organization Section 1599g(e)(2)(A) of title 10, United States Code, is amended by inserting permanent after without the . 1102. Modification of number of available appointments for certain agencies under personnel management authority to attract experts in science and engineering Section 1599h(b)(1) of title 10, United States Code, is amended— (1) in subparagraph (A), by striking 40 and inserting 10 ; and (2) in subparagraph (B), by striking 100 and inserting 130 . 1103. One-year extension of temporary authority to grant allowances, benefits, and gratuities to civilian personnel on official duty in a combat zone Paragraph (2) of section 1603(a) of the Emergency Supplemental Appropriations Act for Defense, the Global War on Terror, and Hurricane Recovery, 2006 ( Public Law 109–234 ; 120 Stat. 443), as added by section 1102 of the Duncan Hunter National Defense Authorization Act for Fiscal Year 2009 ( Public Law 110–417 ; 122 Stat. 4616) and most recently amended by section 1115 of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 ( Public Law 115–232 ), is further amended by striking 2020 and inserting 2021 . 1104. One-year extension of authority to waive annual limitation on premium pay and aggregate limitation on pay for Federal civilian employees working overseas Subsection (a) of section 1101 of the Duncan Hunter National Defense Authorization Act for Fiscal Year 2009 ( Public Law 110–417