As we work through this, I guess that would be a question I would have for the clerk later, as to how the process will work to make sure it.... How will we know what falls within the agreement and what doesn't?
I want to go back to the issue of having bilingual officers. We can't make the assumption that everyone who arrives at the airport is bilingual. They could speak only French. I suspect that already happens, except that there are going to be different rules in force now. What happens to that person who arrives at a pre-clearance destination speaking only French and they encounter an English-only American border services person?