1968—Pub. L. 90–578 substituted provisions as to character of service of full-time and part-time United States magistrates for former provisions prescribing jurisdiction and powers of national park commissioners and practice and procedure before such officers. See section 636 of this title.

“United States magistrate judges” substituted for “United States magistrates” wherever appearing in text pursuant to section 321 of Pub. L. 101–650, set out as a note under section 631 of this title.

Amendment by Pub. L. 90–578 effective Oct. 17, 1968, except when a later effective date is applicable, which is the earlier of date when implementation of amendment by appointment of magistrates [now United States magistrate judges] and assumption of office takes place or third anniversary of enactment of Pub. L. 90–578 on Oct. 17, 1968, see section 403 of Pub. L. 90–578, set out as a note under section 631 of this title.