S.C. Code Ann. § 59-65-210

For each county which has indicated a desire for the service of an attendance supervisor or supervisors there shall be appropriated annually for the ensuing fiscal year a sum sufficient to pay the salaries and expenses of an attendance supervisor or supervisors for each county, one such supervisor for each ten thousand children, or fraction thereof, enrolled in each county as of the closing date of the school year immediately preceding the commencing of each such fiscal year. This sum shall be the State's portion of the attendance supervisor program. Nothing in this article shall limit the number of attendance supervisors that a county or a school district may employ at its own expense.