S.C. Code Regs. § § 19-710.05
An employee who transfers without a break in service from one State agency to another shall transfer his earned sick leave. Any transferred sick leave shall be adjusted to the scheduled workweek of the receiving agency. In the case of an employee transferring from an agency under whose system the employee has, prior to January 1, 1969, a maximum accumulation in excess of that currently authorized by the receiving agency, the total sick leave balance shall be transferred. If the employee subsequently reduces the amount of sick leave carried over to 180 workdays or less, 180 workdays shall become the maximum amount of unused sick leave the employee may thereafter carryover.
An employee of a State agency transferring to a school district of the State or a school district employee transferring to a State agency is permitted to transfer to and retain at his new employer all sick leave he earned at his former employer regardless of his employment status at the new employer.
S.C. Code Regs. § 19-710.05