You are welcome with your UAV in Tonga.
Maximum take-off weight: 7 kilo, above that a permit is obligated
Maximum hight: 120 meters / 393 ft
Maximum horizontal distance: Keep visual contact with UAV
Minimum age: -
Distance Airports / Heliports: 4 km / 2.5 mi.
Night flights: Prohibited
Prohibited: flying over beaches, royal palace, concerts, ships, people, animals, government buildings, graveyards.
Useful link: Tonga’s Ministry of Civil Aviation
Contact information: firstname.lastname@example.org / +676 24144