They have on different occasions and interviews.
https://www.bbc.co.uk/news/uk-northern-ireland-48929182
Its all part of the game being played out.
The GFA says to me that the interviews in which they say they wont are much closer to the truth than this one.
The fact we have absolutely no intention to break MFN, which you’ve agreed, means that they will need to put infrastructure up.
If the worst happens and we leave on No Deal, there will be no choice.