2018—Subsec. (a). Pub. L. 115–270, § 3001(a)(1), substituted “4 years” for “three years”.

Subsec. (b). Pub. L. 115–270, § 3001(a)(2), inserted dash after “The Commission may”, designated remaining provisions as par. (1), substituted “4 additional years beyond the 4 years” for “2 additional years beyond the 3 years”, and added par. (2).

2013—Pub. L. 113–23 designated existing first, second, and third sentences as subsecs. (a), (c), and (d), respectively, and added subsec. (b).

1935—Act Aug. 26, 1935, § 203, amended section generally, striking out “and a license issued” at end of second sentence and inserting “or for other good cause shown after notice and opportunity for hearing” in last sentence.