Papua New Guinea largest towns are also located, including Port Moresby (capital) and Lae; other major islands within Papua New Guinea include New Ireland, New Britain, Manus and Bougainville. Papua New Guinea is one of the few regions close to the equator that experience snowfall, which occurs in the most elevated parts of the mainland. The border between Papua New Guinea and Indonesia was confirmed by treaty with Australia before independence in 1974. Maritime boundaries with Australia were confirmed by a treaty in 1978. Papua New Guinea is part of the Australasia ecozone, which also includes Australia, New Zealand, eastern Indonesia, and several
Monarchy of Papua New Guinea realms, sovereignty is constitutionally vested in the citizenry of Papua New Guinea and the preamble to the constitution states "that all power belongs to the people—acting through their duly elected representatives". The monarch has been, according to section 82 of the constitution, "requested by the people of Papua New Guinea, through their Constituent Assembly, to become [monarch] and Head of State of Papua New Guinea" and thus acts in that capacity. The document thereafter sets out the role and powers of the monarch. The monarch is represented by the Governor-General of Papua New Guinea—appointed by the monarch upon the nomination