1972—Pub. L. 92–425 substituted “subchapter” for “chapter” wherever appearing.
1968—Subsec. (a)(2). Pub. L. 90–485 substituted “19” for “18”.
Statutory Notes and Related Subsidiaries
Effective Date of 1968 Amendment
Amendment by Pub. L. 90–485 effective on first day of third calendar month following Aug. 13, 1968, see section 6 of Pub. L. 90–485, set out as a note under section 1431 of this title.