As part of that agreement, a three-party (Russia, Moldova, Transnistria) Joint Control Commission supervises the security arrangements in the demilitarised zone, comprising 20 localities on both sides of the river. Although the ceasefire has held, the territory's political status remains unresolved: Transnistria is an unrecognised but ''de facto'' independent semi-presidential republic with its own government, parliament, military, police, postal system, currency, and vehicle registration. Its authorities have adopted a constitution, flag, national anthem, and coat of arms. After a 2005 agreement between Moldova and Ukraine, all Transnistrian companies that seek to export goods through the Ukrainian border must be registered with the Moldovan authorities. This agreement was implemented after the European Union Border Assistance Mission to Moldova and Ukraine (EUBAM) took force in 2005. Most Transnistrians have Moldovan citizenship, but many also have Russian, Romanian, or Ukrainian citizenship. The main ethnic groups are Russians, Moldovans, and Ukrainians.