Combat communicable diseases through environmental sanitation, the development of the availability of drinking water and adopting immunization, prophylaxis and treatment measures provided collectively and individually to the entire population. ARTICLE 115. To fulfill the purposes of the agrarian policy, the State will develop the following activities: 1 . Provide farmers with the necessary farmland and regulate the use of water. The Law may establish a special regime of collective property for peasant communities that request it. ARTICLE 227.- They belong to the State and are for public use and, therefore, cannot be subject to private appropriation: 1 . The territorial sea and lake and river waters; the beaches and their banks and the navigable rivers, and the ports and estuaries. All these assets are for free and common use, subject to the regulations established by the Law; 2. Lands and waters used for public services and all types of communications; 3 . The lands and waters destined or that the State allocates for public services of irrigation, hydroelectric production, drainage and aqueducts