S.C. Code Ann. § 8-11-91

The Comptroller General shall, and the governing body of any school district may, upon written authorization by any officer or employee, deduct from the salary or wages of any such officer or employee contributions to be paid over to eligible nonprofit charitable organizations, or groups of such organizations, in the manner prescribed by Sections 8-11-92 through 8-11-97. Chief finance officers of state agencies and institutions maintaining payroll accounts separate from the office of the Comptroller General likewise shall make deductions from the salaries and wages of their officers and employees for such contributions.