2018—Pub. L. 115–282, § 315(a), designated existing provisions as subsec. (a), inserted heading, substituted “Except as provided in subsection (b), not later than 1 year” for “Not later than 1 year”, and added subsec. (b).

Pub. L. 115–282, § 114(b), renumbered section 431 of this title as this section.

Pub. L. 115–282, title III, § 315(b), Dec. 4, 2018, 132 Stat. 4250, provided that: “Not later than 180 days after the date of enactment of this Act [Dec. 4, 2018], the Secretary of the department in which the Coast Guard is operating shall ensure that a flexible work schedule program under chapter 61 of title 5, United States Code, is in place for officers and enlisted members of the Coast Guard.”