Interesting thoughts there adding paper to the mix, but it makes sense. Yep, you better know the laws, but how do you keep up with them all? Usually while driving there are signs like the speed limit. I recently got a ticket for doing a U-turn here in Panama. I told the guy there was no sign, but he said it's illegal everywhere. I had no idea, so now I do no U-turns. The US border is open. I know that the countries down here ship migrants from one border to the next as quickly as possible. Their ultimate destination is always the US. These governments don't care...just get them on the next bus to the next border!