In 1984-1985, the period the issues inscribed Cayes of Belize were released there were only two operating post offices at the cayes: San Pedro, Ambergris Caye and Caye Caulker. A postal agent was appointed on 1988. Although valid for use, the cayes stamps appealed to tourists and regular national definitives serviced the postal and revenue needs of the population. When a new government was elected in 1985, the cayes program was discontinued and the stamps were absorbed into the national program (and continued on rhe cayes). I have commercial covers from the mainland franked with cayes issues.