ICAO Annex 1, Personnel Licensing, amendment 197, effective 23 November 2006:
2.1.10.1 A Contracting State, having issued pilot licences, shall not permit the holders thereof to act as pilot-in-command of an aircraft engaged in international commercial air transport operations if the licence holders have attained their 60th birthday or, in the case of operations with more than one pilot where the other pilot is younger than 60 years of age, their 65th birthday.
2.1.10.2 Recommendation.- A Contracting State, having issued pilot licences, should not permit the holders thereof to act as co-pilot of an aircraft engaged in international commercial air transport operations if the licence holders have attained their 65th birthday.
Althought this applies to ICAO airspace, contracting states have to either adopt the change or publish an exception to the ICAO change. A State may wish to impose a lower maximum age limit than that specified by ICAO in 2.1.10.1. It may do this for the licenses it issues, but, as stated above, it cannot prevent an aircraft operated by a PIC holding a licence from another State, who is below the ICAO upper limit, from operating in its airspace.