Now you need Operating Authority. To haul across state lines, you need Interstate Operating Authority - a "Motor Carrier (MC) Number" from FMCSA.Get your own trucking authority in Texas with our comprehensive trucking authority packages and expert services. FMCSA operating authority is often identified as an "MC," "FF," or "MX" number, depending on the type of authority that is granted. When you have filed all of the paperwork necessary to operate a trucking company, the FMCSA will send you a letter of authority. Apply for your trucking authority. It's the letter from FMCSA with the date your authority went active and what authority was granted. Wash, rinse, and sanitize all food contact surfaces. Our complete authority packages are designed to give you every filing actually required to get you on the road. A forward-thinking leader delivering mobility, enabling economic opportunity, and enhancing quality of life for all Texans.