For years the normal place for my drivers license was in its own designated spot in my wallet. The only time it was removed was for renting cars or those really rare times I was pulled over. With the recent insanity I have had to take it out and put it somewhere multiple times during a single trip through the airport. Of course it was not in its usual place when I arrived at the rental counter two times and panic nearly set in while I searched my wallet, my pants pockets, my shirt pocket and finally the inner pocket of my jacket. Figuring that sooner or later the lost license would be permanent I got my last license, punched a hole in it and wore it around my neck lanyard style. This worked fine until yesterday going through SLC. The DL agent told me that expired licenses were not valid to board the plane. My understanding was the purpose of the ID was to verify identity and I don't think that has changed since the license was issued. I am not asking to drive the airplane or even to drive a rental car on arrival with the ID. All I am trying to do is verify that I am the person authorized to travel on that ticket. She stated that it was an FAA regulation that the license be current. Can anyone point me in the direction of that law or lack thereof. I do not relish the prospect of arriving at my destination without my license and I feel that it is just a matter of time for that to happen with the current situation.