ICAO makes recommendations about the validity length of passports (amongst many other things). Contracting states are free to do whatever they like but for the

ICAO makes recommendations about the validity length of passports (amongst many other things). Contracting states are free to do whatever they like but for the most part, they choose to follow the Recommended Practices. https://www.icao.int/WACAF/Documents/Meetings/2018/FAL-IMPLEMENTATION/an09_cons.pdf https://www.icao.int/WACAF/Documents/Meetings/2018/FAL-IMPLE...