S.C. Code Ann. § 23-45-130
This chapter applies to any fire protection sprinkler contractor performing work for any municipality, county, or the State. Officials of any municipality, county, or the State are required to determine compliance with this chapter before awarding any contracts for the planning, sale, installation, repair, alteration, addition, or inspection of a fire protection sprinkler system, water spray, or water foam system. When a fire sprinkler contractor submits a bid directly to the State, the bid must include on it his fire sprinkler license number.