GM1 CS FTL.1.200 Home base
TRAVELLING TIME
Crew members should consider making arrangements for temporary accommodation closer to their home base if the travelling time from their residence to their home base usually exceeds 90 minutes.
Thanks for that link skyjob.
I'm not sure what this rule actually says about commuting. In fact, it encourages commuting doesn't it. It details exactly what commuters already do for years: they usually have a little apartment close to the base airport.
The guys who travel long distances by car every day should heed this rule more than the commuter in my opinion.