4.20.128.40.1. The franchisee shall bill all subscribers to its cable services in a uniform, nondiscriminatory manner, regardless of the subscriber's level of service. In no case shall any subscriber be required (i) to pay for services more than thirty (30) days in advance of the start of the period of service for which the subscriber is being billed or (ii) to pay for more than thirty (30) days of such services at any one time, provided, however, that the subscriber may be required to pay for more than thirty (30) days of service if the account is or has been past due. The franchisee shall clearly disclose on the billing statement both the date on which the payment is due and the date on which a penalty may begin to accrue if payment has not been received. There shall be a minimum of fifteen (15) days from the date of the postmark on billing statements to the payment due date, and there shall be a minimum of forty-five (45) days from the date of the postmark on the first billing statement to the imposition of a late fee.