Section 3(3)(ii) in The Maharashtra Agricultural Lands (Ceiling on Holdings) Act, 1961
(ii)in the land held in or operated by a co-operative society or held jointly with others or held by a firm, the share of the person shall be taken to be the extent of land such person would hold in proportion of his share in the co-operative society, or his share in the joint holding or his share as partner in the firm, as if the land had been so divided and separately held on the relevant date.