49 CFR § 365.105 - Starting the application process: Form MCSA-1.
(a) Each applicant must apply for operating authority by electronically filing Form MCSA-1, the URS online application, to request authority pursuant to 49 U.S.C. 13902, 13903 or 13904 to operate as a:
(1) Motor carrier of property or passengers,
(2) Broker of general commodities or household goods, or
(3) Freight forwarder of general commodities or household goods.
(b) Obtain forms at a FMCSA Division Office in each State or at one of the FMCSA Service Centers. Addresses and phone numbers for the Division Offices and Service Centers can be found at: https://www.fmcsa.dot.gov/mission/field-offices. The forms and information about filing procedures can be downloaded at: https://www.fmcsa.dot.gov/registration/registration-forms.
(c) Form MCSA-1 is the URS online application and is available, including complete instructions, from the FMCSA website at https://www.fmcsa.dot.gov/urs.