§ 31302.
No individual shall operate a commercial motor vehicle without a valid commercial driver’s license issued in accordance with section 31308. An individual operating a commercial motor vehicle may have only one driver’s license at any time and may have only one learner’s permit at any time.
([Pub. L. 103–272, § 1(e)], July 5, 1994, [108 Stat. 1015]; [Pub. L. 105–178, title IV, § 4011(b)(1)], June 9, 1998, [112 Stat. 407]; [Pub. L. 109–59, title IV, § 4122(1)], Aug. 10, 2005, [119 Stat. 1734].)