Nov 23 sounds familiar as the date ICAO is allowing retirement up to 65, however each ICAO member can set it's own retirement limit. There are many ICAO countries not approving pilots up to 65 (currently Canada), and thus the possible problem. For example, as I understand it, a flight from A to B may not be able to overfly C with crew over that country's retirement age. Sounds tricky for crew sched, and throws senority based bidding out the window. Can't fly to/over US of A, countries B, C, and D after age 60, countries E, F, G after 62...