Of course MPs would have to vote on the repeal of the European Communities Act, should the Government or a Private Member ever propose such a thing.
And of course MPs would have to vote on enacting into law such terms for withdrawal as the Government had negotiated, should there ever be any.
But a Commons division on Article 50, which happened either on the day of the referendum result or not at all (as Jeremy Corbyn made clear on that day), would be a plain and simple waste of parliamentary time.
Without Article 50, the United Kingdom will never and can never leave the European Union.
And we remain, so to speak, without Article 50.