S.C. Code Ann. § 11-50-150: Deposit of money of authority; investment of funds.

All money of the authority and in the Rural Infrastructure Fund, except as authorized by law or provided in this chapter, must be deposited with and invested by the State Treasurer. Funds of the authority not needed for immediate use or disbursement may be invested by the State Treasurer in obligations or securities which are declared to be legal obligations by the provisions of Section 11-9-660.