The rates charged for services furnished by any revenue-producing facility of the district as constructed, improved, enlarged, or extended is not subject to supervision or regulation of any state bureau, commission, board, or other instrumentality or agency of it.
Rates not subject to State supervision or regulation
S.C. Code Ann. § 55-11-670, under Title 55, Chapter 11.
S.C. Code Ann. § 55-11-670