Better idea: amend Schedule II to remove marijuana. Make the change effective immediately. Don't do anything to encourage or enable provinces and municipalities to pass anything at all, or to make it easier for them to do so, because there's nothing important to do. That's it. Everybody's done.

... although you might want to go ahead and repeal the rest of the Act while you're at it, since that whole prohibition thing is obviously stupid and has racked up a really long track record of total failure.

Oh, and get the GG to pardon everybody ever convicted for a marijuana offence.

Stop pussyfooting around.