Carlos Balsa D'Agosto - President | Uruguay | January 1990 - December 1991 |
Alejandro Tinoco - Vice President | Venezuela | January 1987 - December 1992 |
David A. Gantz | United States of America | January 1988 - December 1993 |
Enrique Ponce y Carbo | Ecuador | January 1989 - December 1994 |
José Ajuricaba Da Costa e Silva | Brazil | January 1990 - December 1995 |
José Enrique Rojas Franco | Costa Rica | January 1991 - December 1996 |