Thanks. Sorry to be so dense. I had read that before but for some reason, reading directions prepared by others has gotten me confused.( I am traveling with a group of folks and I am the one providing all the info to them on testing , etc. and am trying to be prepared to answer questions.) I have to say, between what the cruise lines require, what Canada requires, and what the US requires, it is amazing that anyone can manage to not get tripped up somehow!