The airport is operated via a state treaty established in 1946 wherein the two countries (Switzerland and France) are granted access to the airport without any customs or other border restrictions. The airport's board has 8 members each from France and Switzerland and two advisers from Germany.[72] Geneva Airport in Switzerland has a French sector in a similar way. Khmeimim Air Base in Syria is leased to the Russian government for a period of 49 years, with the Russian government having extraterritorial jurisdiction over the air base and its personnel.[73][74] The Free City of Danzig was an international zone that existed between 1920 and 1939, consisting of the Baltic Sea port of Danzig (now Gdańsk, Poland) and nearly 200 towns and villages in the surrounding areas.