Sec. 102.012. OWNERS AUTHORIZED TO APPLY FOR POOLING. The following interested owners may apply to the commission for the pooling of mineral interests: (1) the owner of any interest in oil and gas in an existing proration unit or with respect to a proposed unit; (2) the owner of any working interest; or (3) any owner of an unleased tract other than a royalty owner. Acts 1977, 65th Leg., p. 2571, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.