Except as provided under §§B and C of this regulation, a utility may not terminate service for failure of a customer to pay supplier charges. If a utility purchases the receivables of a supplier under COMAR 20.53.05.03, the purchased supplier receivables become utility charges for the purpose of termination of service under COMAR 20.31. If a utility purchases arrearages attributable to a utility as described in COMAR 20.53.05.12D from a supplier providing supplier-consolidated billing services, the purchased arrearages become utility charges for the purpose of termination of service under COMAR 20.31.