49 CFR § 385.605
New entrant registration driver's license and drug and alcohol testing requirements
November 18, 2020
(a) A non-North America-domiciled motor carrier must use only drivers who possess a valid commercial driver's license—a CDL, Canadian Commercial Driver's License, or Mexican Licencia de Federal de Conductor—to operate its vehicles in the United States.
(b) A non-North America-domiciled motor carrier must subject each of the drivers described in paragraph (a) of this section to drug and alcohol testing as prescribed under part 382 of this subchapter.