Article 26 ANO 2005 has been superceded by Article 62 ANO 2009. Although the wording is slightly different the effect appears to be the same.
As I understand it, ICAO Annex 6 Chapter 2.7.2.1 is the international authority requiring pilots to have licenses issued by or rendered valid by the the state of registry of the aircraft. Individual countries can file differences if they wish.