It's important to understand that the Nadon decision was less about constitutional rights and more about eligibility criteria. It was about ensuring what the court called a historic compromise. Thus, in order for Quebec to accept the Supreme Court's existence in the country, given the province's different legal system, three of the seats on the Supreme Court were reserved for Quebec judges. That is the compromise that was renewed in the Constitution of 1982. In Nadon, the Supreme Court determined that Parliament could not change the definition of a Quebec judge without affecting the makeup of the court, which is protected precisely to ensure Quebec's representation on the court.
On March 7th, 2017. See this statement in context.