Rule 4. In the case of a billing dispute between a provider and a wholesale provider, the parties shall make a good faith effort to work with each other to determine what portion, if any, of the bill for resale or the purchase of a local wholesale product provided by the wholesale provider to the provider is disputed and which portion is undisputed. The wholesale provider and the provider shall work together to resolve the billing dispute and arrange for payment of the undisputed charges, pursuant to the agreement between the wholesale provider and the provider.
Mich. Admin. Code R. 484.1004