Hello Vanessa,
Just wanted to follow-up and let you know I did finally get down to the US and crossed through no problem. I did get flagged at customs (as I expected) but when I showed them package they read though and said everything was fine I could go though. They also indicated I shouldn’t loose it as I’ll most likely need it each time but that’s no big deal.
Thank you very much for all you assistance with this it’s a huge relief to know I can go through without issue now.
Mark