I'm sorry, but I'm not certain that I understand the question, but perhaps I could just make an observation and an attempt to guess at it.
It would be termination of the agreement, I believe the motion that is involved.... So would it be a situation where Canada treats the agreement as having been terminated? In those circumstances then the language about the agreement having been amended from time to time would come in and the force of the legislation in terms of future exchanges of information would cease.