The Emergencies Act embodies the federal-provincial-territorial collaboration and working together, and, in fact, requires consultation with the provinces and territories, and specifically requires that invoking the Emergencies Act for a national emergency only occurs when other federal, provincial or territorial legislative measures are not sufficient.
In addition, in subsection 8(3) of the Emergencies Act, it says that where a declaration of emergency were to have been made, following such a declaration, it is, of course, anticipated that the provinces and territories would continue to act within their legislative spheres and that the federal government's actions should not unduly impair or intrude upon those actions.
I would say that the Supreme Court, since 1987, has very much spoken of co-operative federalism as a key constitutional concept, and I would say that the Emergencies Act, as passed by Parliament, reflects co-operative federalism and federal-provincial-territorial collaboration.