Originally Posted by
Lead Balloon
Are you saying that, because of (l), (n) has no practical operation? That would be an unusual interpretation.
Seems that (n) is intended to operate in circumstances in which a pilot's tour of duty exceeds 12 hours or the flight time exceeds 9 hours, despite having been rostered for less than 12/9.
Poor choice of words on my part LB. What I meant was (l) sets the limit for the duty and the idea that “once commenced” in (n) does not allow for a duty to be rostered beyond 12 hours.