Two basic types of agroindustrial complexes are provided for by the regulations. The first type is a membership organization in which the constituent farms retain their juridical identity and a certain measure of economic independence. The second type is a centralized organization in which the constituent farms are merged and lose their separate identities. A further distinction is made depending upon the nature of the constituent farms and other economic organizations. Agroindustrial complexes composed only of collective farms and other collective organizations are called cooperative complexes. Those constituted by state farms and other state economic organizations are known as state complexes. If both state and collective farms or other organizations are members, the complex is referred to as state-cooperative. The distinctions have both legal and economic implications. In early 1971 the form of the 139 agroindustrial complexes established up to that time was: collective, seventy-seven; state, seven; and state-cooperative, fifty-five. Six complexes were created as centralized organizations in which the constituent farms lost their legal independence. The largest of these complexes covered an area of 145,000 acres. Legal and Economic Aspects The legal and economic aspects of the farm consolidation are extremely involved, and most of the problems raised by consolidation have not been worked out even theoretically. Activities of cooperative and state-cooperative complexes are governed by the Provisional Regulation issued in October 1970 and by earlier regulations concerning collective organizations in matters not covered by the Provisional Regulation. State agroindustrial complexes are subject to the same regulations that apply to all state economic associations (trusts). The Ministry of Agriculture was directed to prepare a draft statute for agroindustrial complexes by the end of 1972, which was to be submitted at an indefinite future date to the first agroindustrial complex conference for discussion and adoption. Official statements and documents have emphasized the voluntary and democratic nature of agroindustrial complexes. Zhivkov's report to the Central Committee plenum stated that farms would be free to opt whether or not to join a complex and which complex to join if they decided to do so. They were also to have freedom of decision concerning the establishment of joint enterprises. The plenum's decision used a broader formulation by referring only to voluntarism in the formation of agroindustrial complexes on the basis of mutual advantage. The Provisional Regulation contains a clause that permits farms and other organizations to withdraw from the agroindustrial complex at their own request.