on the north and west by the southern boundary of the Tropical
Zone and the east coast of Madagascar;
on the south by the parallel of latitude 20°S;
on the east by the rhumb line from the point latitude 20°S,
longitude 50°E, to the point latitude 15°S, longitude 51°30'E,
and thence by the meridian of longitude 51°30'E to latitude 10°S.
on the north by the southern boundary of the Tropical Zone;
on the east by the coast of Australia;
on the south by the parallel of latitude 15°S from longitude
51°30'E, to longitude 114° and thence the meridian of longitude
114° to the coast of Australia;
on the west by the meridian of longitude 51°30'E.