If a customer fails to make a payment in compliance with his equal monthly payment plan, a utility shall provide at least one warning notice that the payment is past due and that nonpayment of two consecutive bills shall render the customer subject to removal from the Utility Service Protection Program and service termination. Except as otherwise provided in §D, a customer may be removed from the Utility Service Protection Program and subject to service termination if the customer fails to pay, on two consecutive monthly due dates, the amount due. Notwithstanding a customer making payments in compliance with his equal monthly payment plan, the customer may be subject to service termination when applicable grounds exist under COMAR 20.31.02.03 or COMAR 20.31.02.04. In initiating service termination, the utility shall comply with COMAR 20.31 before any termination of service may occur.