S.C. Code Ann. § 58-11-200

The Office of Regulatory Staff may require any radio common carrier to file annual reports in such form and of such content as the Office of Regulatory Staff may require and special reports concerning any matter about which the Office of Regulatory Staff is authorized to inquire or to keep itself informed, or which it is required to enforce. All reports shall be under oath when required by the Office of Regulatory Staff. At the same time a radio common carrier files a report with the Office of Regulatory Staff, it also must provide a copy to the commission.