S.C. Code § 42-1-390
Any employer who, having elected to come under this title, being at that time exempt from this title, and subsequently desiring to withdraw from under its terms, may give notice in writing either to the commission that he no longer is under the terms of this title or to his insurer who shall give notice in writing to the commission that the employer is no longer under the terms of this title. If the insurer does not give the notice to the commission as required by this section, the insurer shall pay a penalty of one thousand dollars to the commission which shall be used by the commission to offset the costs of administering the provisions of Title 42. In the case where the employer gives the notice to the commission that he no longer is under the terms of this title, the commission shall, in turn, within thirty days of receipt of the employer's notice, inform the employer, in writing, that he must provide written notification by a date certain to his employees of his withdrawal from the terms of this title; however, no employer is required to so notify his employees unless the commission informs him he must do so, as required by this section. At the expiration of sixty days from the date of written notice to the commission the employer no longer is liable under the terms of this title and may be permitted to set up any defense as he may be advised to any action brought against him for personal injury or death by accident to any employee.
S.C. Code § 42-1-390