All requests for arbitration services from members of the BAC must be a joint request from the parties to the dispute. In the case of interest arbitration, both parties must sign a letter or form requesting interest arbitration from the BAC. In grievance arbitration cases, if the applicable collective bargaining agreement includes an agreement to use the services of the BAC, the request filed need not be a joint request.
12- 180 C.M.R. ch. 13, § 51