''On the North.'' By a line from the Northeast extreme of Celebes (HREF="http://www.kotoba.ne.jp/word/11/Sulawesi" TITLE="Sulawesi">Sulawesi ) through the Siau Islands to the South point of Sangi () thence to the Southern extreme of the Talaud Group, through these islands to their Northeastern extreme () and thence a line to Tanjong Sopi, the Northern point of Morotai Island.
''On the East.'' By the West coast of Morotai from Tanjong Sopi as far South as Wajaboela (), thence a line to the Northern point of Halmahera and down its West coast to Tanjong Libolo, its Southern extreme.
''On the South.'' A line from the Southern extreme of Halmahera to the North point of Bisa (Setile) Island, thence to the Northern extreme of Obi Major, through this island to Tanjong Ake Lamo, its Southwestern point, thence to Tanjong Dehekolano, the Eastern extremity of the Soela (HREF="http://www.kotoba.ne.jp/word/11/Sula Islands" TITLE="Sula Islands">Sula ) Islands, along their Northern coasts to Tanjong Marikasoe, the Western extreme, thence a line to the Southeast point of Banggai Island ().
''On the West.'' The East coasts of Banggai and Peleng Islands to North Bangkalan () thence a line to Tg. Botok (Celebes) () round the coast to Tg. Pasir Pandjang () and across to Tg. Tombalilatoe (123°21'E) on the opposite coast, thence up the East coast to Tg. Poeisan, the Northeastern extreme of Celebes.