S.C. Code Ann. § 58-11-430

The commission may ascertain and fix just and reasonable classification, regulations, practices, or service to be furnished, imposed, observed, and followed by any or all radio common carriers; prescribe reasonable regulations for the examination and testing of such service and for the measurement thereof; establish or approve reasonable rules, regulations, specifications, and standards; and provide for the examination and testing of any and all appliances used for the service of any radio common carrier.