The Director of Fish and Game shall identify and list those streams and watercourses throughout the state for which minimum flow levels need to be established in order to assure the continued viability of stream-related fish and wildlife resources. The director shall include in this identification list those streams and watercourses the director determines are significant, along with a statement of findings as to why that stream or watercourse was selected. The identification list required by this section shall rank the streams and watercourses beginning with those where the need for establishing minimum flow levels is the greatest. The director, at his discretion, may revise the list and may add or delete streams or watercourses as circumstances require. The initial identification list required by this section shall be completed no later than January 1, 1984.