All property of a municipal port authority shall be exempt from levy and sale by virtue of an execution and no execution or other judicial process shall issue against the same nor shall any judgment against a municipal port authority be a charge or lien upon its property provided, that nothing herein contained shall apply to or limit the rights of the holder of any bonds to pursue any remedy for the enforcement of any pledge or lien given by a municipal port authority on its system revenues or other moneys.
N.J.S. § 40:68A-60