I was going to say the same thing as Tallulah. How do they enforce it? Drug testing if you are coming back from Amsterdam?

How can you prove that it was spoken about on US soil? Couldn't people just loophole around it and say that it was a spur of the moment idea? (Using the reference that the article makes about the bridal party getting weed as a gift) Unless of course some dumbass sends out a memo or something while here.

I dunno, doesn't make sense to me on how they'd keep up with it.