OfReg (or the 'Office') is responsible for the licensing and regulation of all radio transmitters in the Cayman Islands, including:
- Radios in aircraft registered with the Cayman Islands Civil Aviation Office
- Ground-to-air radios located in the Cayman Islands
- Radios in ships registered with the Cayman Islands Shipping Registry
- Radios in unregistered ships operating in the coastal waters of the Cayman Islands
- Land-based marine band radios used by coastal boat operators
- Amateur (HAM) Radios
- All land-based radio transmitters, irrespective of frequency, located in the Cayman Island
All radio licences are currently annual, and therefore must be renewed on each anniversary of their initial issue.