86. Nothing in any contract between a landlord and a non-agricultural tenant made before or after the commencement of this Act shall take away or limit the rights of such tenant as provided for by this Act, and any contract which is in contravention of the provisions of this section or which is inconsistent with, or purports to alter the effect of, any of the provisions of this Act, shall, to the extent of such contravention or inconsistency or to the extent it purports to alter such effect, be void and without effect.