Ms. Boucher, I think there's a problem with the legislation governing collective agreements, because every union has the right to bargain only on behalf of its own members. If those members are all women, a union cannot negotiate based on comparisons with jobs not covered by the bargaining unit. So, there is no possibility of comparing that female unit with a male unit. Pay equity therefore has to be facilitated through other legislation.
There is a Supreme Court ruling on this. Air Canada is another longstanding example that could be informative in that regard.