Arik uses Nigerian CAA rules please.
I'm confident Nigeria has rules, as does any country. But many pretty much just copy the rules from the countries that developed them.
I have no idea what the case is in Nigeria, however, I was told that the rules follow FAA rules, and that pilots flying there can use their FAA or JAA licenses.
For instance, duty times of 8 flying 16 duty in 24 hours, 24 hours off in 7 days, 30 hour max per week, 100 month, and 1000 year. I'm going to bet they are EXACTLY the same in Nigeria.
If that's the case, and I were betting, I would think age 65 was also the same. Again, I don't know, merely speculating.