S.C. Code Ann. § 58-17-1910

If any contract, agreement, or arrangement is, in the opinion of the Office of Regulatory Staff, in violation of any of the provisions of this chapter, the Office of Regulatory Staff must notify the railroad companies in writing specifying its objections. If, within five days after receipt of the notice, the railroad companies fail or neglect to amend and alter the contract, agreement, or arrangement in a manner satisfactory to the Office of Regulatory Staff, the Office of Regulatory Staff must institute and conduct any legal proceedings necessary to enforce the penalties prescribed in this chapter for violations of its provisions.