S.C. Code Ann. § 31-7-60: State tax exemptions.

The obligations authorized by this chapter and the income from the obligations and all security agreements and indentures executed as security for the obligations made pursuant to the provisions of this chapter and the revenue derived from the obligations are exempt from all taxation in the State of South Carolina except for inheritance, estate, or transfer taxes and all security agreements and indentures made pursuant to the provisions of this chapter are exempt from all state stamp and transfer taxes.