During her husband's third term as president, Isabel served as vice president and following her husband's death in office, Isabel served as president from July 1,1974 to March 24,1976.
During her husband's third term as president from 1973 to 1974, Isabel served as both vice president and First Lady. Following her husband's death in office, Isabel served as president from July 1,1974 to March 24,1976.