Home2006 Treaties and Agreements ...Vietnam (06-531.4) – Agreement Regarding Supply of Energy Services under Contract hide Vietnam (06-531.4) – Agreement Regarding Supply of Energy Services under Contract TIAS Office of Treaty Affairs May 31, 2006 Trade and Investment: Energy Services Agreement effected by exchange of letters at Hanoi May 31, 2006; entered into force May 31, 2006. Download attachment [319 KB] Tags Trade and Investment Treaties Vietnam