Applicability. Each motor carrier and intermodal equipment provider must file Form MCS-150, Form MCS-150B or Form MCS-150C with FMCSA as follows:
(1) A U.S.-, Canada-, Mexico-, or non-North America-domiciled motor carrier conducting operations in interstate commerce must file a Motor Carrier Identification Report, Form MCS-150.
(2) A motor carrier conducting operations in intrastate commerce and requiring a Safety Permit under 49 CFR part 385, subpart E, must file the Combined Motor Carrier Identification Report and HM Permit Application, Form MCS-150B.
(3) Each intermodal equipment provider that offers intermodal equipment for transportation in interstate commerce must file an Intermodal Equipment Provider Identification Report, Form MCS-150C.