Tax exemption form for returnees

My Mother-in-law is in the process of moving back to Grenada (she is Grenadian born) from London. The family is planning to ship furniture into Grenada from Miami to furnish her newly finished house. I understand that a 'one-off' tax exemption exists for returnees, allowing them to ship household items, furniture etc, into Grenada without paying the usual import tax.

Does anyone know whether the relevant form/documentation is available to download????