S.C. Code § 12-28-1130
Each person who is an importer of motor fuel subject to the user fee into this State by a tank wagon operating out of or controlling a bulk plant in another state, if the destination of that tank wagon is within twenty-five miles of the borders of South Carolina, shall make application for and obtain a license from the department before engaging in import activities. However, registration as a tank wagon operator-importer does not constitute authorization of the persons to acquire nonexempt motor fuel free of the user fee imposed by this chapter at a terminal either within or outside this State for direct delivery to a location in South Carolina. A person who possesses a valid importer's license is eligible as a tank wagon operator-importer without issuance of a separate license if the importer also operates one or more bulk plants outside this State. The fee for a tank wagon operator-importer license is fifty dollars. Operators of tank wagons delivering products into this State more than twenty-five miles from the border shall apply for an importer's license under Section 12-28-1125.
S.C. Code § 12-28-1130