Home1991 Treaties and Agreements ...Mongolia (91-1127) – Agreement on Trade Relations hide Mongolia (91-1127) – Agreement on Trade Relations TIAS Office of Treaty Affairs November 27, 1991 Trade and Investment Agreement signed at Washington January 23, 1991; entered into force November 27, 1991. With exchanges of letters. Download Agreements [23 MB] Tags Mongolia Trade and Investment Treaties Treaties and International Agreements