It can take years. It can take many years.
As you know, for an appeal to make its way up to the Supreme Court of Canada can take years, up to six to ten years in the worst cases, but certainly a few years at a minimum. Then you get that court's decision. That decision is then implemented by the lower courts. As you know, we're just dealing with humans here, so there can be different interpretations at different lower courts, and it can be a long and slow process to work out the meaning of a new term.