S.C. Code Ann. § 58-23-510
Every motor vehicle carrier which shall operate in this State shall, as soon as such certificate is issued and annually on or before each succeeding January 1st as long as such certificate remains in force, present it, with any changes which have been made therein by the Commission, to the Commission and make an application in writing for registration and license as prescribed in Chapter 3 of Title 56 for owners of motor vehicles generally.