Conn. Agencies Regs. § 7-471-39
Any employee organization, employer, or arbitrator may request the board to determine the scope of collective bargaining if
(3) a party alleges that an illegal subject of bargaining is improperly submitted to a grievance arbitrator.
A request for such a determination shall be submitted to the board in the same form as a request for a declaratory ruling and shall be subject to the same procedure. If such a request has the effect of delaying negotiations or arbitration, the board shall make every effort to expedite the proceeding.
(Effective May 7, 1980)