S.C. Code Regs. § 103-446
Copies of all schedules of rates for service, contracts for service which involve rates, forms of contracts for service, charges for service connections and extensions of mains, and all rules and regulations concerning the relations between the customer and gas utility, shall be filed with the commission by each gas utility and shall be subject to prior approval by the commission. All contracts for service between any industrial customer and any gas utility which establish or adjust rates for any industrial customer shall be filed with the commission by each gas utility and may become effective as of the date of the contracts, unless disapproved or modified by the commission. Complete schedules, contract forms, rules and regulations, etc., as filed with the commission, shall also be available for public inspection at the local offices of the gas utility.
S.C. Code Regs. 103-446