"Existing service" means service presently being extended to a customer or which has been extended to a customer within the past six months. A utility shall not require a cash deposit or other guarantee of payment as condition of continuing existing service unless a customer has an unsatisfactory credit or service standing with the utility due to either of the following:
the service of the customer has been disconnected or has been liable for disconnect for nonpayment of a bill which is not in dispute; or
the service of a customer has been disconnected or has been liable for disconnect for any permissible reason which is not in dispute.
October 9, 2008