Lao kip of the Soviet collapse in 1991 and the persistence of chronic inflation, there are no coins currently in circulation in Laos. In 1979, banknotes were introduced in denominations of 1, 5, 10, 20, 50 and 100 kip. 500 kip notes were added in 1988, followed by 1000 kip in 1992, 2000 and 5000 kip in 1997, 10,000 and 20,000 kip in 2002 and 50,000 kip on January 17, 2006 (although dated 2004). On November 15, 2010 a 100,000 kip banknote was issued to commemorate the 450th anniversary of the founding of the capital, Vientiane, and the 35th anniversary of the
Association of Southeast Asian Nations member states for air passenger services have been removed, while from 1 January 2009, full liberalisation of air freight services in the region took effect. On 1 January 2011, full liberalisation on fifth freedom traffic rights between all capital cities took effect. This policy supersedes existing unilateral, bilateral, and multilateral air services agreements among member states which are inconsistent with its provisions. The concept of an Asian Currency Unit (ACU) started in the middle of the 1990s, prior to the 1997 Asian financial crisis. It is a proposed basket of Asian currencies, similar to the European Currency Unit, which was