"On August 3, 1967, the Confederated Tribes of the Warm Springs Indian Reservation of Oregon ("Tribe") approved and adopted the "Water Resources Inventory and Water Management Plan for the Warm Springs Indian Reservation". The purpose of the plan is to determine what the Reservation water resource consists of, what the present and future uses of the resource are, and what the priority of uses will be, and specifically how these rights will affect individuals and the community. On April 17, 1968, this plan was adopted as Ordinance No. 45; the official Water Code of the Warm Springs Indian Reservation. On July 18, 1980, the Tribe approved technical information entitled "Implementing Provisions of the Warm Springs Water Management Plan". The implementing provisions set forth plans for management of the quality of waters including establishing water quality standards for surface waters on lands under the jurisdiction of the Tribe. Under this plan and amendments thereof, the Tribe will continue to manage water quality by evaluating each discharge and activity, whether existing or a new proposal, on a case-by-case basis, based on the best information currently available and within the limiting framework of minimum standards, treatment criteria, and policies set forth in the plan."--From Legislative History section (page 1).