Good for you. I hadn't seen that. But you should become more familiar with Canadian constitutional law and conventions. We are not America. Everything is not 100% governed by regulations and written procedures. Any PM who went to war without the consent of Parliament could be out of office very quickly. We are not the United States, Our structure of government is different. We can and have ousted PM’s part way through their terms. The last one to go that way was Joe Clark in the 1980’s, for being exactly that kind of arrogant leader. When we went to Gulf War 1 the issue was commented on. Mulrooney took the position that he “could” send troops into combat without Parliament’s say-so, but he didn’t dare try. Nor should you rely too heavily on Wicki. It talked about declaring war. Because of the UN Charter it is legally probable that Canada will never again make a “Declaration of War”. It is not done any more. No Canadian PM has ever tried to go to war without parliamentary approval, and to do so might well result in a constitutional challenge. In Canada there are things called constitutional conventions that are a constitutional version of the common law. It is quite possible, maybe even probable, that any PM who tried to send Canadian Forces into indefinite combat without the approval of Parliament would be out on his ear mid-term. That possibility was talked about when Mulrooney was contemplating his options in 1990. Unlike the US, we can do that.
I have assisted in drafting orders in council.