Home1989 Treaties and Agreements ...Grenada (89-303) – Treaty Concerning the Encouragement and Protection of Investment hide Grenada (89-303) – Treaty Concerning the Encouragement and Protection of Investment TIAS Office of Treaty Affairs March 3, 1989 Trade and Investment Treaty concerning the encouragement and protection of investment signed at Washington on May 2, 1986 with annex. Entered into force March 3, 1989. Download attachment [6 MB] Tags Grenada Trade and Investment Treaties