units of seven to fifteen families, united in a common endeavor to raise food or to produce goods. These production units had been organized in line with the policy of moving toward socialism. He affirmed that each member of these groups would receive at least one hectare of land to cultivate for communal purposes, plus a private plot not exceeding a quarter of a hectare on which to grow vegetables or to graze livestock. Also, a July 1980 planning conference called for a policy of "simultaneous development of family (private) economy and national (socialized) economy." The conference also decided that the state should buy agricultural products from the peasants and should sell them manufactured goods at free-market prices. The KPRP further clarified its economic policy at its Fourth Party Congress (its first since taking power in Phnom Penh) from May 26 to May 29, 1981. It declared that the nation's economic system had three main parts—the state economy, the collective economy, and the family economy, and that each of these parts "had its own significant role." The state economy covered large-scale agricultural production, all industrial production, the communications and transportation networks, finance, and domestic and foreign trade. To facilitate economic transactions nationwide, the state restored the banking system in November 1979, and it reintroduced currency in March 1980. The KPRP acknowledged that the state economy was small and said that it should be expanded. The party leaders, however, aware of the pitfalls of central planning, warned against "over-expansion and disregard for real needs, production conditions, management ability, and economic capability." The collective economy—the largest of the three elements—was assigned an important role in agricultural rehabilitation and development. It consisted of solidarity groups in agriculture, fishing, forestry, and handicrafts. These groups also assumed the task of collective purchase and sale. The family-run economy included the home economies of the peasants, most retail businesses, individual artisans, handicrafts, repair shops, and small trade. Although the 1981 Constitution stated that the land and other natural resources were state property, it gave the citizens usufruct rights to land allotted for a house and garden by the state. In some cases, agricultural workers were also allowed to borrow an extra plot of land from the state, to produce food on it, and to keep the harvest for their own consumption. Private enterprise also made a modest beginning under Cambodia's hybrid economic system. Citizens were allowed to