Cooperative means an association or federation or cooperative of milk producers organized under the laws of New York State, or any other state, having agreements with their producer members to market, bargain for or sell the milk of such producers, and is actually performing one or more of these services in the marketing of milk produced by their members, through the cooperative or through a federation of milk cooperatives in which the cooperative has membership.
N.Y. Comp. Codes R. & Regs. Tit. 1 § 40.10