Any provision of or implication in this article to the contrary notwithstanding, no amount transferred and paid to the Alabama State Port Authority pursuant to this article may be pledged by the port authority to pay principal of or interest on any bonds or other obligations issued by or for the benefit of the port authority; nor shall this article be deemed to constitute a contract between the state or the port authority and the holders of any bonds or other obligations heretofore or hereafter issued by or for the benefit of the port authority, it being understood as follows:
Ala. Code § 33-2-213 (1975)