49 U.S. Code § 312. Alternative timing system
The date of enactment of the National Timing Resilience and Security Act of 2018, referred to in subsecs. (b)(1) and (c)(1), (2), is the date of enactment of section 514 of Pub. L. 115–282, which was approved Dec. 4, 2018.
Section 1618 of the National Defense Authorization Act for Fiscal Year 2017, referred to in subsec. (b)(1), is section 1618 of Pub. L. 114–328, div. A, title XVI, Dec. 23, 2016, 130 Stat. 2595, which is not classified to the Code.
Section 514(b) of Pub. L. 115–282, which directed the addition of section 312 at the end of chapter 30 of this title, was executed by adding this section at the end of subchapter I of this chapter to reflect the probable intent of Congress and because no chapter 30 has been enacted in this title.
 So in original.