The union filed a grievance and requested the Minister to appoint an arbitrator under section 45 of the Labour Relations Act.
Subsequently, the employer referred the same grievance to the Ontario Labour Relations Board under section 124.
The Minister referred the question of his authority to appoint an arbitrator to the Board.
The Board held that because the employer was entitled to refer the grievance under section 124, and because the Board's jurisdiction under section 124 was established before the Minister appointed an arbitrator under section 45, the Board had exclusive jurisdiction.
Furthermore, any conflict between the two sections is resolved by section 118, which provides that the construction industry provisions (section 124) prevail.