In clause (4), the words “departments, agencies, and instrumentalities of the United States Government” are substituted for “Government agencies” for consistency in the revised title and with other titles of the United States Code.

2024—Pub. L. 118–63 struck out subsec. (a) designation and heading “Civil Aeromedical Institute” at beginning of section and struck out subsec. (b). Prior to amendment, text of subsec. (b) read as follows: “The Secretary of Transportation shall define the roles and responsibilities of the William J. Hughes Technical Center in a manner that is consistent with the defined roles and responsibilities of the Civil Aeromedical Institute under subsection (a).” See section 106(h) of this title.

2018—Pub. L. 115–254 substituted “Regions and centers” for “Civil aeromedical research” in section catchline, designated existing provisions as subsec. (a) and inserted heading, and added subsec. (b).