i haven't flown since 9-11 but will soon, i found a link to this in the federal code which i printed out and plan to show if needed, maybe it could help others here:(posted 8302 days ago)14 CFR Aeronautics and Space CHAPTER I FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Continued)
SUBCHAPTER F -- AIR TRAFFIC AND GENERAL OPERATING RULES
PART 108 -- AIRPLANE OPERATOR SECURITY
108.17 Use of X-ray systems
(e) No certificate holder may use an X-ray system to inspect carry-on or checked articles unless a sign is posted in a conspicuous place at the screening station and on the X-ray system which notifies passengers that such items are being inspected by an X-ray and advises them to remove all X-ray, scientific, and high-speed film from carry-on and checked articles before inspection. This sign shall also advise passengers that they may request that an inspection be made of their photographic equipment and film packages without exposure to an X-ray system. If the X-ray system exposes any carry-on or checked articles to more than 1 milliroentgen during the inspection, the certificate holder shall post a sign which advises passengers to remove film of all kinds from their articles before inspection. If requested by passengers, their photographic equipment and film packages shall be inspected without exposure to an X-ray system.
joe