Originally Posted by trustbutverify

1. There is nothing stopping anyone from deviating to an earlier DH with a scheduled layover longer than 9 hours. However, there are numerous issues and situations limiting the ability to deviate to a later DH.
You can deviate later if you want if your'e on your last day. You just tell them you aren't taking the DH.

2. The only legal DH deviation is to something earlier, not later. For a reserve for instance, you're clock resets at the completion of scheduled DH, not the later DH if that's what is chosen. Also, crew hotel bookings for follow on crews are predicated on the scheduled layover, not the later DH deviation - i.e. you may be occupying someone else's room if you stay longer than scheduled.
You can deviate later if you are on your last day.

3. The company has to give you 10 hours break from duty completion after the layover whether it was 9 hours or 24 hours. Difference is, now they have you on the hook earlier (if reserve) with the 9 hour layover.
If the company gives you less than 10 hours of rest before a DH, you are not good for any flight duty until you get at least 10 hours of rest after completion of the DH. And per-117, that 10 hours has to allow you to get 8 hours sleep opportunity. So if you can't fall asleep midday, you are not satisfying the 8 hour part.

4. Not all 9 hour layovers are front or back end of rotation. Some are in the middle.
Who cares. If they don't give you 10 hours of rest, you are a pumpkin, period. The company is only hurting their operation if they don't give you 10 hours of rest, because you haven't been reset yet and won't be good for anything until you get at least 10 hours of rest.

5. I thought I made it pretty clear in my earlier post, I do not support going back to a dangerously flawed FAR 121. I do support raising the bar to what other carriers have as minimum layovers.

Finally, do you or have you ever had a position in DALPA?
No, and I have no intent at this time. For me 117 is pretty simple and straight forward. I consider hands above the old rules. Could it need improvements, sure, but I don't get why anyone thinks there is anything dangerous about getting any rest before a DH. You are a pumpkin and can't do any flight duty until you get at least 10 hours of rest later.