Section 96 [74-10-96 N.M. Stat. Ann.] of the Solid Waste Authority Act does not apply to or limit the right of the holder of any security, his trustee or any assignee of all or part of his interest, the federal government when it is a party to any contract with the authority, and any other obligee under that act to foreclose, otherwise to enforce, and to pursue any remedies for the enforcement of any pledge or lien given by the authority on the proceeds of taxes, service charges or other revenues.