>Décisions et Ressources>Demandes d'autorisation>Greater Essex County District School Board v. International Brotherhood of Electrical Workers, Local 773, United Association of Journeymen and Apprentices of The Plumbing and Pipefitting Industry of The United States and Canada, Local 552 and International Union of Bricklayers and Allied Craft Workers, Local 6, International Union of Painters and Allied Trades, Local 1494 and Labourers International Union of North America, Local 625 and Ontario Labour Relations Board