The Department of Parks and Recreation shall have principal responsibility for the review and approval of proposals for rehabilitating urban lakes in accordance with the eligibility requirements, evaluative criteria, and procedures specified in this chapter and for the administration of grants made pursuant to this chapter. The Department of Fish and Game shall be responsible for determining the rehabilitative potential of lakes proposed for funding and shall serve primarily in a technical and advisory capacity. The final decision to provide funding for each project shall be based on the cooperative deliberation and mutual determination of both departments.