The complainant Carpenters union filed a jurisdictional dispute under section 91 of the Labour Relations Act regarding the assignment of sheet metal siding installation at the Bruce Nuclear Power Development.
Ontario Hydro had assigned the work to the Sheet Metal Workers.
The Board considered criteria including area practice and employer past practice, noting that 99.9% of sheet metal siding in the area was installed by sheet metal workers.
The Board upheld Ontario Hydro's assignment to the Sheet Metal Workers and declined to make the direction provincial in scope.
