By law electrical work in the Cook Islands is to be carried out in accordance with AS/NZS 3000.
I don't know where your signaller dreamed up the requirement to comply with “ISS International regulations”, whatever they are!
(Mrs Google appears to be unaware of their Ten amp points may be safely be connected to a supply being protected by a 20 amp circuit breaker, providing the fixed wiring is rated accordingly.
Under AS/NZS 3000, points are now also required to be protected by an RCD (Residual Current Device).
Cook Islands Electrical Registration number 002