This year India is celebrating 25 years of partnership with an international organization, which also happens to be the 50th year of that organization's foundation. Name the organization:

India became a sectoral dialogue partner of ASEAN IN 1992 as a part of ‘Look East’ policy of the government. In 1996 India becomes a full dialogue partner and from 2002 it starts attending annual summits. In 2010 the Free Trade Agreement (FTA) in goods between India and ASEAN comes into effect. In 2014 another FTA in services and investment was signed by all ASEAN nations except Philippines. It is also the 50 years of the foundation of ASEAN. The leaders of all the ten ASEAN member nations will attend our next Republic Day celebrations.