The applicant trade union applied for certification under the construction industry provisions of the Labour Relations Act.
The Mechanical Contractors Association of Ontario (MCAO), the designated employer bargaining agency for the ICI sector, sought to be made a party to the proceedings.
The MCAO argued it had a direct interest because it would become the employer's bargaining agent if certification was granted, and because the threshold issue of whether the work was construction work affected its members.
The Board denied the MCAO's request, finding that an employer bargaining agency's statutory role is limited to collective bargaining and does not grant it a direct legal interest in certification proceedings or the determination of threshold jurisdictional issues.