In my view, in the Nadon case, the Supreme Court realized that, when creating the formula for amending the Constitution in 1981-82, the governments in Canada didn't simply say how the Constitution could be amended.
In other words, they didn't simply provide a recipe. They also removed a small area from Parliament's jurisdiction. As a result, once the amending formula was adopted, Parliament could no longer do certain things alone. However, the area is more limited than we think. It must be established based on the goals that the governments at the time, meaning in 1981-82, were pursuing by identifying a certain number of characteristics in sections 41 and 42 of the Constitution Act, 1982. The Supreme Court told us that the goal of paragraph 41(d), the composition of the Supreme Court, is obviously to make sure Quebec is represented on the Supreme Court. The amendments proposed by Parliament at that time—I think they were adopted when the court heard the Nadon case—affected the eligibility requirements that helped determine who was a judge from Quebec and who wasn't. Therefore, the Court said that, in this case, it had touched the so-called limited area, the area that was removed from Parliament's jurisdiction.
My point is that the bilingualism requirement isn't related to Quebec's representation. In practice, the bilingualism requirement will particularly affect judges from outside Quebec, although the reverse is possible. Adding a bilingualism requirement doesn't in any way change Quebec's representation on the Supreme Court, which is protected by paragraph 41(d) of the Constitution.
I think we would give too much leeway to the Supreme Court's decision by saying that we can no longer touch the Supreme Court Act or anything related to sections 4, 5 and 6.