S.C. Code Ann. § 48-3-40

The principal, interest and premium, if any, on any bonds shall be secured by a pledge of the revenues payable to the county or the incorporated municipality, as the case may be, pursuant to the loan agreement and may also be secured by a lien on any property given as security by the industry pursuant to the loan agreement and any bonds may be issued pursuant to and secured by a trust indenture. The proceedings under which bonds are authorized to be issued or any such trust indenture may contain any agreements and provisions customarily contained in instruments securing bonds, including, without limiting the generality of the foregoing, provisions respecting the fixing and collection of the sums payable by the industry to the county or the incorporated municipality, as the case may be, pursuant to the loan agreement, the maintenance and insurance of the pollution control facilities, the creation and maintenance of special funds by the industry, and the rights and remedies available in the event of default to the bondholders or to the trustee under such trust indenture, all as the governing board shall deem advisable. Provided, however, that in making any such agreements or provisions no county or incorporated municipality shall have the power to obligate itself except with respect to any security pledged, mortgaged or otherwise made available by the industry for the securing of the bonds, and the application of the revenues from the loan agreement, and shall not have the power to incur a pecuniary liability or a charge upon its general credit or against its taxing powers. The proceedings authorizing any bonds hereunder and any trust indenture securing such bonds may provide that in the event of default in payment of the principal of or the interest on such bonds or in the performance of any agreement contained in such proceedings or trust indenture, such payment and performance may be enforced by mandamus or by the appointment of a receiver in equity with such powers as may be necessary to enforce the obligations thereof. No breach of any such agreement shall impose any pecuniary liability upon any county or incorporated municipality, as the case may be, or any charge upon its general credit or against its taxing power. The trustee or trustees under any trust indenture, or any depository specified by such trust indenture, may be such persons or corporations as the governing board shall designate, notwithstanding that they may be nonresidents of South Carolina or incorporated under the laws of the United States or the laws of other states of the United States.