Bangkok , 18 November 2003 Opening for signature In accordance with its article 5 ( 1 ) , the above Agreement shall be open for signature by States which are members of the United Nations Economic and Social Commission for Asia and the Pacific ( ESCAP ) at Shanghai , China , from 26 to 28 April 2004 , and thereafter at United Nations Headquarters in New York , from 1 May 2004 to 31 December 2005 .