DEMONSTRATION OF BACKUP AND COMPLEMENTARY POSITIONING, NAVIGATION, AND TIMING CAPABILITIES OF GLOBAL POSITIONING SYSTEM.

SEC. 1603. DEMONSTRATION OF BACKUP AND COMPLEMENTARY POSITIONING, NAVIGATION, AND TIMING CAPABILITIES OF GLOBAL POSITIONING SYSTEM. Effective on June 1, 2019, section 1606 of the National Defense Authorization Act for Fiscal Year 2018 (Public Law 115-91; 131 Stat. 1725) is amended— (1) in subsection (c)(2), by striking “the date that is 18 months after the date of the enactment of this Act” and inserting “December 31, 2020”; and (2) in subsection (d), by striking “18 months after the date of the enactment of this Act” and inserting “December 31, 2020”.