Article 19. The Democratic People's Republic of Korea relies on socialist relations of production and on the foundation of an independent national economy. Article 20. In the Democratic People's Republic of Korea the means of production are owned by the State and social, cooperative organizations. Article 21. The property of the State belongs to all the people. There is no limit to the property which the State can own. All natural resources, railways, air transport service, post and telecommunications establishments, as well as major factories and enterprises, ports and banks of the country are owned solely by the State. The State shall protect and develop on a preferential basis State property which plays the leading role in the economic development of the country. Article 22. The property of social, cooperative organizations is collectively owned by the working people involved in the organizations concerned. Land, farm machinery and ships, as well as small and medium-sized factories and enterprises may be owned by social, cooperative organizations. The State shall protect the property of social, cooperative organizations. Article 23. The State shall enhance the ideological consciousness and the technical and cultural level of the peasants, increase the role of the property of all the people in leading the cooperative property so as to combine the two forms of property in an organic way, and shall consolidate and develop the socialist cooperative economic system by improving the guidance and management of the cooperative economy and gradually transform the property of cooperative organizations into the property of the people as a whole based on the voluntary will of all their members. Article 24. Private property is property owned and consumed by individual citizens. Private property is derived from socialist distribution according to work done and from supplementary benefits granted by the State and society. The products of individual sideline activities including those from kitchen gardens, as well as income from other legal economic activities shall also be private property. The State shall protect private property and guarantee by law the right to inherit it. Article 25. The Democratic People's Republic of Korea regards the steady improvement of the material and cultural standards of the people as the supreme principle of its activities.