The corporation will render monthly or every two months bills for water service. All bills shall be due and payable within thirty days after deposit in the United States mail or presentation to the consumer. Payment shall be made at the office of the corporation or, at the corporation's option, to duly authorized collectors of the corporation. If any bill is not paid within thirty days after the deposit in the United States mail or presentation to the consumer, the water service shall be subject to discontinuance after written notice is given to the consumer.
Haw. Code R. § 15-319-31