Intrastate Authority

The Department of Public Safety, State Transport Police Division requires all companies that operate a CMV which:

  • Has a gross vehicle weight rating or gross combination weight rating, or gross vehicle weight or gross combination weight, of 4,536 kg (10,001 pounds) or more, whichever is greater; or

  • Is designed or used to transport more than 8 passengers (including the driver) for compensation; or

  • Is designed or used to transport more than 15 passengers, including the driver, and is not used to transport passengers for compensation; or

  • Is used in transporting material found by the Secretary of Transportation to be hazardous under 49 U.S.C. 5103 and transported in a quantity requiring placarding under regulations prescribed by the Secretary under 49 CFR, subtitle B, chapter I, subchapter C.

To register online for a South Carolina intrastate DOT number at

Failure to register and obtain the above SCDOT number and clearly display the number on all trucks owned or operated by the carrier, will subject the carrier to penalties to include a $100.00 fine per occurrence for operating a vehicle without the SC DOT number displayed.

Should you have any questions, contact:

      Department of Public Safety
      State Transport Police
      10311 Wilson Blvd. / P.O. Box 1993
      Blythewood, SC 29016
      Telephone: 803-896-5500
      Fax: 803-896-5526

Or go to

For Household Goods and or Hazardous Materials you will need to submit by mail or fax, an application for a Class E Certificate to both:

      Public Service Commission
      Clerk's Office
      Post Office Drawer 11649
      Columbia, SC 29211
      Fax: 803-896-5199

      Office of Regulatory Staff
      Transportation Department
      1401 Main Street, Suite 900
      Columbia, SC 29201
      Fax: 803-737-0815


Interested in obtaining your own operating authority? Interstate commerce is trade, traffic, or transportation involving either the vehicle, its passengers, or cargo crossing a state boundary. Intrastate commerce is trade, traffic, or transportation within a single state.


Interstate Authority

Also referred to as an "MC","FF" or "MX" number, depending on the type of authority that is granted. Generally, 'for-hire' carriers engaging in interstate commerce are required to have Interstate Authority Federal Motor Carrier Safety Administration (FMCSA).