S.C. Code Ann. § 48-5-90: Authority authorized to pledge its revenues or funds to payment of bonds; other security for payment of bonds.

The authority may pledge its revenues or funds to the payment of its bonds, subject only to prior agreement with the holders of particular bonds which may have pledged specific money or revenue. Bonds may be secured by a pledge of a loan obligation owned by the authority, a grant, contribution, or guaranty from the United States, the State, or a corporation, association, institution or person, other property or assets of the authority, or a pledge of money, income, or revenue of the authority from any source.