Very cool, if true

They currently only have the authority to set one up across the Northern Ireland border.

Which is what they're trying to avoid, by making alternative suggestions. Because their don't want to.

They're not insisting the border goes in the Irish Sea. They're saying that they need a solution to the good Friday agreement, and that's the only one they can think of, and if the UK doesn't like that then please can it come back with an alternate suggestion.