Company would never go for a restriction of their operation, and a 50% requirement is worthless anyway. You could get that schedule at many other airlines for way more money.

solve it with money, and make it expensive. Many ways to go about it but off the cuff:

1. 100% abg override for any overnight trips.
2. 5 hour min day pay


this would allow a reserve pilot to still make abg for an assigned overnight. 1 overnight (2 days) would result in 10 hours abg.

someone picking it up in open time already abg would essentially make 20 hours pch

someone assigned it to their line would make 10 abg, even if it’s a composite with 1 trip on their schedule.

id say that would make overnights desirable enough for it not to be a problem with the pilots, and expensive enough to dissuade the company from going that direction.