"On the North." The Southern limit of Sulu Sea Tagolo Point, down the West coast of Mindanao to the Southwest extremity thence to the North coast of Basilan Island (), through this island to its Southern extremity, thence a line to Bitinan Island () off the Eastern end of Jolo Island, through Jolo to a point in long. 121°04'E on its South coast, thence through Tapul and Lugus Islands and along the North coast of Tawitawi Island to Bongao Island off its Western end (), and from thence to Tanjong Labian, the Northeastern extreme of Borneo and the Southwest coast of Mindanao.