1968 convention (original)
The convention had amendments on 3 September 1993 and 28 March 2006. There is a European Agreement supplementing the Convention on Road Traffic (1968), which was concluded in Geneva, on 1 May 1971.
Note that before 29 March 2011 the convention demanded contracting parties to recognise as valid for driving in their territories:
any domestic driver's permit drawn up in their national language or in one of their national languages, or, if not drawn up in such a language, accompanied by a certified translation;
https://en.wikipedia.org/wiki/International_Driving_Permit