Glad to see that they are using the BLM rules. Here's why:
http://www.blm.gov/nhp/what/commerci...ng/permit.html
I have a printed copy of the still photography section highlighted in bright yellow. That's in case a part-time summer want-a-be trys to tell me that a tripod means a permit.

Where you say "still photography" it only means if using; "models, sets or props that are not part of the site's natural or cultural resorces or administrative facilities."

If your making a film or ad bill the client.