Thanks for all the links! Alas, after working a couple years (actually interacting with people/not being shut in) I've come to realize the world is not as by the book as I had imagined; you can get away with a lot, and even then, most people will bend the rules if you ask nicely and smile. So after reading Romulus' advice, I called up the
Houston Police Department's Bush International division. They basically told me all I had to do was give them a few pieces of info so they knew to look for me. That's it. Mighty simple if you ask me.

So I guess I'll be off on a jolly day of photography in downtown Houston & KIAH.

PS: It's an old photo, I'm (semi-)clean shaven now. Alas, employer like the clean-shaven. :-/