S.C. Code § 42-1-460
Every contract of service between any employer and employee covered by this title, written or implied, in operation or made or implied prior to July 17, 1936, shall be presumed to continue, subject to the provisions of this title; and every such contract made subsequent to said date shall be presumed to have been made subject to the provisions of this title. A like presumption shall exist equally in the case of all minors, unless notice of the same character be given by or to the parent or guardian of the minor.
S.C. Code § 42-1-460
1996 Act. No. 424, Section 13, provides, in part, as follows: "Employers who have filed with the Workers' Compensation Commission a notice to reject the provisions of Title 42 before the effective date of the 1996 amendment will have until July 1, 1997, to comply with the provisions of the 1996 amendment relating to insuring their workers' compensation liabilities. Any employer who has rejected the terms of this title prior to approval of the 1996 amendment and has procured another form of employee benefits insurance shall comply, not later than July 1, 1997, with the provisions of the 1996 amendment relating to the insuring of its workers' compensation liabilities. Furthermore, nothing in the 1996 amendment shall affect or alter any cause of action, right, or claim accruing before the effective date of the 1996 amendment; however, any such cause of action, remedy, or claim accruing before the effective date of the 1996 amendment shall be governed by the law prior to the effective date of the 1996 amendment."