S.C. Code Ann. § 56-11-500

As to revenue collected under this chapter or other road taxes on motor carriers, the Department of Motor Vehicles must withhold from the State Highway Fund monies not to exceed the actual or projected costs associated with administering and enforcing the provisions of this chapter. The State Treasurer and the Comptroller General shall establish accounts as necessary to facilitate the efficient and effective operation of this chapter and deposit from the State Highway Fund initial monies as may be necessary to operate this program. All remaining taxes and penalties and interest collected by the department pursuant to the provisions of this chapter must be deposited in the State Highway Fund.