S.C. Code Ann. § 44-6-1150

The department may impose a penalty of up to five percent of the fee for any ambulance service that fails to pay the fee within the time required by the department for each month, or fraction thereof, that such fee is overdue. If a fee has not been received by the department in accordance with department timelines, the department may withhold an amount equal to the overdue fee and any penalty imposed by the department from any payments otherwise due such ambulance service.