| Countries | Year Signed | Year in Effect |
| Antigua and Barbuda | 1996 | 1999 |
| Argentina | 1997 | 2000 |
| Bahamas | 1990 | 1994 |
| Barbados | 1996 | 2000 |
| Belize | 2000 | 2001 |
| Bolivia | 1995 | 1996 |
| Colombia | 1979 | 1982 |
| Costa Rica | 1982 | 1991 |
| Cuba | 1904 | 1905 |
| Dominica | 1996 | 2000 |
| Dominican Republic | 1909 | 1910 |
| Grenada | 1996 | 1999 |
| Guatemala | 1903 | 1903 |
| Haiti | 1904 | 1905 |
| Jamaica | 1983 | 1991 |
| Mexico | 1978 | 1980 |
| Panama | 1904 | 1905 |
| Paraguay | 1998 | 2001 |
| Peru | 2001 | 2003 |
| St. Kitts and Nevis | 1996 | 2000 |
| St. Lucia | 1996 | 2000 |
| St. Vincent and the Grenadines | 1996 | 2000 |
| Trinidad and Tobago | 1996 | 1999 |
| Venezuela | 1922 | 1923 |