S.C. Code Ann. § 34-30-1370: Investments in direct general obligations of state government, bonds payable from pledged revenues or earnings.

A state savings bank may invest in bonds or other evidences of indebtedness that are direct general obligations of a state, county, city, town, village, school district, sanitation, or park district, or other political subdivision or municipal corporation in the top three rating bands of one of the national rating services. A state savings bank also may invest in bonds or other evidences of indebtedness that are payable from revenues or earnings specifically pledged for it, which are issued by a county or a political subdivision or municipal corporation of a county in this State up to the loan limitations of Section 34-30-1300.