Board refused to hear viva voce evidence on a preliminary motion to determine the scope of admissible past practice evidence.
In a jurisdictional dispute complaint between the Boilermakers and the Labourers regarding demolition work, the Labourers sought to adduce viva voce evidence on a preliminary basis to challenge the Board's earlier ruling on the parameters of admissible past practice evidence.
The Board dismissed the request, holding that it has inherent jurisdiction to determine the relevance of evidence without first hearing it, and that evidence regarding the demolition of structures other than field-erected, steam-generating boilers in an operating environment is irrelevant to the specific work in dispute.
International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers, Local, 128 v. Labourers International Union of North America, Local 1089 and Foster Wheeler Limited, 1991 CanLII 6174