Member States Bangladesh Commencement Date: 06 June 1997 Bhutan Commencement Date: 08 February 2004 India Commencement Date: 06 June 1997 Myanmar Commencement Date: 22 December 1997 Nepal Commencement Date: 08 February 2004 Sri Lanka Commencement Date: 06 June 1997 Thailand Commencement Date: 06 June 1997 History Charter Mechanism Member States Emblem Flag Secretary General Former Secretaries General