See how can the British government offer this to the EU as a "solution" to the border issue when they know that they won't get agreement to it in their own country.
The opposition will vote against, the DUP will certainly vote against, and I bet there are some conservative backbenchers who will not be happy with this.
Maybe I'm being cynical again, but is this a ploy to pretend to have a solution so that the UK can "move on" to talks about customs and goods etc and keep Brexiters happy, while in reality having no solution at all?
And then when it all goes to shit they can blame the EU, Ireland, NI, the DUP and anyone they like with "It's not my fault, I came with a solution, you lot are bullies"