Every Mexico-domiciled motor carrier that enters the U.S. must have an FMCSA-assigned MX number, a valid FMCSA Certificate of Registration or Operating Authority and a USDOT Number.It is usually in respect to a person who is domiciled in Mexico. The operating authority (MC/FF/MX Number) is also known as docket numbers. According to FMCSA, “Mexico-domiciled motor carrier that enters the U.S. must have an FMCSA-assigned MX Number, a valid FMCSA Certificate of Registration for commercial-zone operations, or long-haul Provisional or Standard Operating Authority Registration, and a USDOT Number regardless of the distance traveled into the U.S.” It is also assigned to brokers and interstate for-hire motor carriers that apply for operating authority.
The time it takes to obtain an MX Number also varies depending on when the application is submitted. It also depends on how the application is submitted. One also needs to refer to the guidelines enlisted as per Unified Registration System and what comes under Commercial Zone Authority.