(a) The real property of an authority is exempt from levy and sale by execution. An execution or other judicial process may not issue against the property, and a judgment against the authority may not be a charge or lien on the property.
(b) Subsection (a) does not limit the right of an obligee to foreclose or otherwise enforce a mortgage of an authority or to pursue a remedy for the enforcement of a pledge or lien given by the authority on its rents, fees, or revenues.