Call your U.S. senators office, they should be able to give you the phone # of the department you need to talk to. They should also be able to tell you what's legal, blade length, for carry on.
If I hadn't lost my temper I'd be alot sharper.
Bartman: Don't know if this'll help...a few months ago Tactical Knives had an article by Steven Dick, where he went on a trip to Mexico and tested a large Kershaw G-10 ATS-34 and other knives. I think he said the only problem he had was at LAX when they wouldn't let him board the plane with a Calypso Jr. because it locked. Anyway, enjoy your trip!