You are legal to start, legal to finish but only for an 8 hour flying day- delays/deice/whatever can cause 8 scheduled hours to become 9... Still legal. Most airlines have contracts that dictate duty time below the 16 hours per FAA, at PNCL its 14:30 i believe. This is one where you MUST be at/or below 14:30 for the day to end as planned. Now, if you have been on duty for 11 hours and just blocked out for a *planned* 3 hour flight- you are legal to complete it. Even if inflight delays make a 3 hour flight turn into 4 hours and you are now at 15 hours. A deadhead is NOT considered rest and is part of work- you are getting paid. So lets assume you are going strictly by the FAA for 16 hours in a duty period... Your day ends with you at an outstation after working for a 14:00 duty day you have 2 hours to be released into rest. If your deadhead leaves 30 minutes later and is a *scheduled* 2 hour flight, you are NOT legal to take the deadhead b/c your total duty will be 16:30. With that being said, if you are onboard on time for a 1:30 min flight (this would make the total duty day 16 hours) and then there are arrival delays/blah/blah BEYOND YOUR CONTROL and you get in 30 min late you duty was 16:30 and you are legal. I hope all that makes sense. Also you must have a minimum of 8 hours between rest periods no matter what. and O=- he was NOT legal for that deadhead...