djb, Did you make the trip?
About a year before the Passport rule came into effect, a BP officer told me about the requirements for my US born daughter to have a passport when crossing the border. At the time, he told me she could continue to use the passport even after it expired, since the passport was proof enough that she was a US citizen.
That was years ago, I wonder how true that was. Since, (1) it became into effect for air travel first, (2) just became required this month to cross by land, and (3) it states in their website that children under 16 are not required to have a passport to cross - for them a Birth Certificate will suffice. I couldn’t believe it when I heard it from someone until I read it at the government website. They make it harder to comprehend the law when it doesn’t apply to all.
Since that encounter, my husband and I have become naturalized citizens. Our family is already set up w/ passports. Easier to travel, I think.
Just want to get informed, since many of our friends and family cross the border often.