To appreciate this contention it will be convenient to read the material portions of article 31A. Article 31A. (1) Notwithstanding anything contained in article 13, no law providing for (a) the acquisition by the State of any estate or of any rights therein or the extinguishment or modification of any such rights, . . . . . . . . . shall be deemed to be void on the ground that it is inconsistent with, or takes away or abridges any of the rights conferred by article 14, article 19 or article 31. . . . . . . . (2) In this article, 898 (a) The expression " estate " shall, in relation to any local area, have the same meaning as that expression or its local equivalent has in the existing law relating to land tenures in force in that area, and shall also include any jagir, inam or muafi or other similar grants and in the States of Madras and Kerala any janmam right.