Michigan Administrative Code
Department - Licensing and Regulatory Affairs
Public Service Commission
Consumer Standards And Billing Practices For Electric And Gas Residential Service
Part 5 - BILLING AND PAYMENT STANDARDS
Section R. 460.124 - Payment period

(1) The date a bill is sent is the date the utility transmits the billing information to the customer. If the last day for payment falls on a day when the mail is not delivered, or other day when the utility offices that accept customer payments are not open to the general public, the payment date shall be extended through the next business day. Customer remittances postmarked on the due date shall be considered to have been timely paid. If the postmark is illegible, the date of mailing shall be designated as 2 days before receipt by the utility.

(2) If a customer fails to make full payment by the due date, the utility may implement its collection practices, including the use of automated telephone calls which remind the customer or a third party that the bill is past due. Neither the utility nor its agents shall make more than 1 call per day to a specific customer or third party in which contact is made with the customer or third party.