The principal of and interest on any bonds issued under the authority of this article shall be secured by a pledge of the revenues from which such bonds shall be payable, may be secured by a trust indenture covering all or any part of the railroad and necessary equipment from which the revenues so pledged are derived. The proceedings under which such 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 revenues for any railroad covered by such proceedings or trust indenture, the maintenance and insurance of the railroad and necessary equipment, the creation and maintenance of special funds from the revenues of the railroad, and the rights and remedies available in the event of default to the bondholders or to the trustee under trust indenture, all as the director shall deem advisable and as shall not be in conflict with the provisions of this article; provided, however, that in making any such agreements or provisions, the division shall not have the power to obligate itself except with respect to the railroad and necessary equipment and the application of the revenues therefrom, and shall not have the power to incur a pecuniary liability or a charge upon its general credit or against the full faith, credit or taxing power of the State of South Carolina or any political subdivision thereof. 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 power to charge and collect revenues and to apply the revenues from the railroad in accordance with such proceedings or the provisions of such trust indenture. Any such trust indenture may provide also that in the event of default in payment or the violation of any agreement contained in the trust indenture, it may be foreclosed by proceedings at law or in equity, and may provide that any trustee under the trust indenture or the holder of any of the bonds secured thereby may become the purchaser at any foreclosure sale, if he is the highest bidder. No breach of any such agreement shall impose any pecuniary liability upon the division or department or any charge upon its general credit or against the full faith, credit or taxing power of the State of South Carolina, or any political subdivision thereof.

The trustee or trustees under any trust indenture, or any depository specified by such trust indenture, may be such persons or corporations as the director 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.