1Effective December 29, 1988, the Administrator determined that commercial driver's licenses issued by Canadian Provinces and Territories in conformity with the Canadian National Safety Code are in accordance with the standards of this part. Effective November 21, 1991, and as amended on January 19, 2017, the Administrator determined that the new Licencias Federales de Conductor issued by the United Mexican States are in accordance with the standards of this part. Therefore, under the single license provision of § 383.21 , a driver holding a commercial driver's license issued under the Canadian National Safety Code or a new Licencia Federal de Conductor issued by Mexico is prohibited from obtaining a non-domiciled CDL, or any other type of driver's license, from a State or other jurisdiction in the United States.
49 C.F.R. §383.23