The Multiple-Use Sustained-Yield Act of 1960 (or MUSYA) (Public Law 86-517) is a federal law passed by the United States Congress on June 12, 1960. This law authorizes and directs the Secretary of Agriculture to develop and administer the renewable resources of timber, range, water, recreation and wildlife on the national forests for multiple use and sustained yield of the products and services. This is the first law to have the five major uses of national forests contained in one law equally, with no use greater than any other. By the 1950s, the national forests no longer held enough resources to meet the growing needs of an increasing population and expanding economy. The U.S. Forest Service had operated within broad authorities since Gifford Pinchot's time as Chief Forester. Now, for the first time the agency had a specific congressional directive which stipulated that timber sales were not in all cases to be the limiting factor. MUSYA defines the terms "multiple use" and "sustained yield" as follows: The 1960 law was amended by the Omnibus Parks and Public Lands Management Act of 1996.