h-d,
Yes, but there is a separate definition in the CARS -"Flight deck duty time" which specifies time in an operating position.
On THAT definition, they would be entitled to count NO bunk time- so at to moment we have sort of an amalgam.
BUT, Block hours are defined as chocks off to chocks on, so I can't see any way around them having to change- but I'm sure they'll try for later rater than sooner!!