| Countries | Date signed | Name | |
|---|---|---|---|
| Guatemala | 30/03/1990 | View coding English | |
| Guatemala | 01/06/1990 | View coding English | |
| Guatemala | 26/04/1991 | View coding English | |
| Guatemala | 26/04/1991 | View coding English | |
| Guatemala | 25/07/1991 | View coding English | |
| Guatemala | 10/01/1994 | View coding English | |
| Guatemala | 29/03/1994 | View coding English | |
| Guatemala | 29/03/1994 | View coding English | |
| Guatemala | 17/06/1994 | View coding English | |
| Guatemala | 23/06/1994 | View coding English |