3.4. Billing Related Dates:
3.4.2. Bill due date" -- The date when the utility mails the bill.
3.4.3. Latest pay date" -- The last date that the bill may be paid without incurring a late payment penalty. The latest pay date shall be no sooner than the 20th day following the date the utility mails the bill and must be stated on the face of the bill.
3.4.4. Delinquent bill" -- Any bill issued by a public service district or a municipal system that has not been paid within twenty (20) days of the bill due date; or any bill issued by a sewer utility that is not a public service district or a municipal system within thirty (30) days of the bill due date. The date that a bill will become delinquent must be stated on the face of the bill.