A prior section 4 of act March 3, 1927, was classified to section 281c of Title 5 prior to the general revision and enactment of Title 5, Government Organization and Employees, by Pub. L. 89–554, § 1, Sept. 6, 1966, 80 Stat. 378. Subsection (a) of section 4 was transferred to section 163 of Title 21, Food and Drugs, prior to the omission of section 163 from the Code on the authority of Reorg. Plan No. 1 of 1968, eff. Apr. 8, 1968, 33 F.R. 5611, 82 Stat. 1367, set out in the Appendix to Title 5.

Pub. L. 114–125, title VIII, § 802(h)(2), Feb. 24, 2016, 130 Stat. 215, provided that: “The individual serving as the Assistant Commissioner of the Office of International Trade on the day before the date of the enactment of this Act [Feb. 24, 2016] may serve as the Executive Assistant Commissioner of Trade on and after such date of enactment, at the discretion of the Commissioner of U.S. Customs and Border Protection.”