before 29 March 2011 the convention demanded contracting parties to recognise as valid for driving in their territories: any domestic driver's licence 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; any domestic driver's licence conforming to the provisions of annex 6 to the convention; and any international driver permit conforming to the provisions of annex 7 to the convention. Prior to 29 March 2011, annex 6 and annex 7 defined forms of driver's licences that are different from those defined after that date. Driving licences issued before 29 March 2011 that match older edition of the annexes are valid until their expiration dates (article 43). 1949 convention The 1949 Geneva Convention on Road Traffic has been ratified by 101 states. The 1949 Convention's description of a driving permit and international driving permit are located in Annexes 9 and 10. Switzerland signed but did not ratify the convention. The 1949 Geneva Convention states that an IDP remains valid for one year from the date of issue, with a grace period of six months. There is a European Agreement supplementing the 1949 Convention on Road Traffic, in addition to the 1949 Protocol on Road Signs and Signals, concluded in Geneva on 16 September 1950. "Permissible maximum weight" of a vehicle means the weight of the vehicle and its maximum load when the vehicle is ready for road. "Maximum load" means the weight of the load declared permissible by the competent authority of the country(or jurisdiction) of registration of the vehicle. "Light trailers" shall be those of permissible maximum weight not exceeding 750 kg (1,650 lbs). 1926 convention The 1926 International Convention relative to Motor Traffic is the older IDP Convention. It is only required in Somalia. International Driving Permits according to the 1926 Convention on Motor Traffic might also still be valid in Liechtenstein and Mexico. However, both are parties of the above-mentioned later conventions, thus the most recent signed convention is the valid one. Mexico also recognizes the Inter-American Driving Permit according to the convention on the Regulation of Inter-American Automotive Traffic 1943. Validity According to the 1968 Vienna Convention, an IDP must have an expiration date of no more than three years from its issue date or until the expiration date of national driving permit, whichever is earlier, and it is