Interestingly, the Guantanamo incident which found fatigue as a factor in the crash raises the question of the liability of the CAA.
Having proposed a safety amendment if they then back down on implementing it due to comercial pressure from airlines they could be held liable should an acident occur where fatigue was identified as a causal factor. The recent court case involving the M62 driver springs to mind; fatigue was identified as the root cause of the crash.