§ 158. Real property of authorities exempt from levy. All real
property of an 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 an authority be a
charge or lien upon its real property; provided, however, that the
provisions of this section shall not apply to or limit the right of
obligees to foreclose or otherwise enforce any mortgage of an authority
or the right of obligees to pursue any remedies for the enforcement of
any covenant of an authority or of any pledge or lien given by an
authority on its rents, fees or revenues.