The water resources planning council shall, as expeditiously as practicable following the conclusion of its hearings, but in no case later than January first, nineteen hundred eighty-eight, determine, based on the record, whether the statewide water resources management strategy should be approved with modifications or disapproved, and shall state in writing the reasons for its determination. If the council has determined approval of the strategy, it shall be adopted by the departments of health and environmental conservation and other appropriate state agencies in the form determined by the council. If the council has determined disapproval of the strategy, the department of environmental conservation, in conjunction with the department of health, shall modify the strategy in accordance with the determination issued by the council and resubmit the strategy to the council for its action.