Papua New Guinea belongs to a variety of regional organizations, including the Asia-Pacific Economic Cooperation (APEC) forum; the ASEAN Regional Forum (ARF) (Papua New Guinea is an observer member of the ASEAN); the South Pacific Commission; and the South Pacific Regional Environmental Program (SPREP).
The U.S. and Papua New Guinea are signatories to the U.S.-Pacific Islands Multilateral Tuna Fisheries Treaty, under which the U.S. grants $18 million per year to Pacific Island parties and the latter provide access for U.S. fishing vessels. The U.S. also supports Papua New Guinea's efforts to protect biodiversity; the International Coral Reef Initiative is aimed at protecting reefs in tropical nations such as Papua New Guinea.