Apply for your trucking authority. You'll also need to complete either an OP1 or OP1 (P) form in addition to the BOC3 form.FMCSA operating authority is often identified as an "MC," "FF," or "MX" number, depending on the type of authority that is granted. This guide will simplify the process of obtaining MC numbers and trucking authority in ten steps. It's the letter from FMCSA with the date your authority went active and what authority was granted. OUT-OF-SERVICE: Carrier is under any type of out-of-service order and is not authorized to operate. Operating Authority Status. Can I sell alcoholic beverages to out of state residents?