FOM 2.55: "The uniform will be worn from trip check-in to trip completion, regardless of duties. The uniform will be worn in its entirety whenever in the public eye or Company areas, except for the member lounges or aircraft."
Wear whatever you like until check in. Entering the AOC or leaving the AOC you can wear your leather jacket (or any other combination) that you see fit. At the aircraft - wear what you like. The FOM doesn't cover the layover hotels or rest times very well. By the letter of the law - sounds like we should be in uniform at, on, and in your hotel room since you are still on a trip and in the public eye.
