After public hearing and any investigations deemed necessary have been completed, the chairperson, after consultation with the appropriate county council, county mayor, and county water board, shall make a recommendation to the commission for decision. The commission shall render its decision within ninety days after the chairperson's recommendation to the commission. If the commission decides to designate a water management area, it shall cause a public notice of its decision to be given in the appropriate county and when so given, its decision shall be final unless judicially appealed.
HRS § 174C-46