S.C. Code Ann. § 8-11-650: Workweek upon which leave is based.

Leave, as authorized by this article, shall be based upon a five-day workweek except where services are maintained seven days a week; provided, however, that no agency shall schedule a workweek of less than thirty-seven and one-half hours. The Department of Administration, through the State Personnel Division, may establish, by appropriate regulations, procedures for the equitable calculation of leave for those employees who work a different number of days, including permanent part-time employees.