I'm not wrong.🤣
The political declaration is what speaks to the future relationship. Because of it, a back stop is required in the withdrawal agreement.
If the political declaration changes ie to a customs union, a back stop is no longer required and becomes moot.
The withdrawal agreement is no more than a short term transition agreement, the political declaration is the agreement for when we have exited.
A back stop is required in the withdrawal agreement, the transition agreement, purely because of the political declaration, the future relationship. If the future relationship post exit, the political statement, changes to something like a customs union, then the back Stop is no longer required and becomes irrelevant in the WA.
It is in there, because a back stop would need to be in place by the time we exit, if we maintain the political declaration, because post exit we would trade on different terms. If we do not trade on different terms, then no back Stop is required to be put in place before we exit.