Thailand was one of the founding members of ASEAN and has been instrumental in the formation and development of the ASEAN Free Trade Area (AFTA). AFTA entered into force on 1 January 2010 for the six original ASEAN (ASEAN-6) members (Thailand, Singapore, Malaysia, Indonesia, Philippines, and Brunei) thereby reducing import duties to zero; the so-called CLMV countries (Cambodia, Laos, Myanmar and Vietnam) will follow suit in 2015