The Secretaries of Interior and Agriculture are hereby authorized and directed to develop and implement, on an experimental basis on selected areas of the public rangelands which are representative of the broad spectrum of range conditions, trends, and forage values, a program which provides incentives to, or rewards for, the holders of grazing permits and leases whose stewardship results in an improvement of the range condition of lands under permit or lease. Such program shall explore innovative grazing management policies and systems which might provide incentives to improve range conditions. These may include, but need not be limited to—