S.C. Code Ann. § 9-1-1175

Effective July 1, 2006, the board shall increase the employer contribution rate for the system by one-half percent of the earnable compensation of all members employed by an employer participating in the system. The board shall further increase the employer contribution rate by one-half percent effective July 1, 2007. The employer rate provided in this section also applies to payments for unused annual leave under the circumstances provided in Section 9-1-1020. The employer rate provided in this section includes the system's normal contribution rate and accrued liability contribution rate, but does not include contributions for group life insurance or other benefits that are remitted to the retirement systems. Contributions for group life insurance or other benefits are in addition to the applicable employer contribution rate. After June 30, 2007, the board, in its discretion, may increase or decrease the employer contribution rate set by this section based on the actuarial valuation provided to the board by the system's actuaries and considering the normal contribution rate determined pursuant to Section 9-1-1060 and the accrued liability contribution rate determined pursuant to Section 9-1-1070.