All real property of the board of land and natural resources shall be exempt from mechanic's or materialmen's liens; provided that recovery for such claims may be had from any bond supplied as required by section 206-22. The real property shall also 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 the board be a charge or lien upon its real property; provided that this section shall not apply to or limit the right of obligees to foreclose or otherwise enforce any mortgage of the board or to pursue any remedies for the enforcement of any pledge or liens given by or with the consent of the board.
HRS § 206-24