As a drilling reservist in a squadron, I have been told on several occasions that you cannot travel out of the U.S. drilling on AFTPs on IDTT orders. They say we have to be on AT or ADT orders because of SOFA agreements, but no one can show me where this policy comes from. Is this written down somewhere? The only thing I've found in writing is that you cannot go into a hazardous duty area on drills.

Please help me to "Confirm" or "Bust" this this urban legend.