Got section 48 of the CAO's open here now.
The 14 hour figure relates to duty time. Thats time at work whether flying or not.
Can't think of too many operations where you actually get to fly this many hours while you're at work though (helicopter mustering excluded).
170 hours a month is only a little over 6 hours a day.
Interstate truck-drivers and machinery operators every where would wonder what kind of wimp can't handle a 6 hour day.