There was a lot of discussion about the possibility of Italy becoming communist and how to prepare against that. There are expulsion or suspension mechanisms and those were considered to be off the table as an addition, so the general idea was that if a nation is not fulfilling the “values” of the charter or able to be expected to fulfill obligations it has no expectation of having the obligations to it met.

Another point that was raised in the context of a member state becoming communist is that would likely leave anyways, which deflated some of the worry about not having a removal mechanism explicitly laid out.