What is the difference between the pat down if the passenger 'beeps' the WTMD where there are no body scanners compared to opting out of a body scan? Is it only in the states where the security staff are conducting more extensive pat downs if opting out of a body scan?
Can the checks be done in public if opting out or does it have to be done in private? Is it normally a private room or just in a separate area?
Does the airport require the passenger to sign any form? If so, what does the form say?