49 CFR § 368.1 - Certificate of registration.

(a) A Mexico-domiciled motor carrier must apply to the FMCSA and receive a Certificate of Registration to provide interstate transportation in municipalities in the United States on the United States-Mexico international border or within the commercial zones of such municipalities as defined in 49 U.S.C. 13902(c)(4)(A).

(b) A certificate of registration permits only interstate transportation of property in municipalities in the United States on the United States-Mexico international border or within the commercial zones of such municipalities. A holder of a Certificate of Registration who operates a vehicle beyond this area is subject to applicable penalties and out-of-service orders.