SECTION 1. The barrios of Maitum, Upper Maitum, Maguling, Ticulab, Luan, Mindupok, Lanao, Talukao, Kalaong Mabay, Penal, Kalanig, Malalag, Upper Malalag, Kiayap, Sison, Kambojan, Kiambing, Saub, Milbuk, Linao and Takal, Municipality of Kiamba, Province of Cotabato, are separated from said municipality, and are constituted into a distinct and independent municipality to be known as the Municipality of Maitum, Province of Cotabato, with the seat of government at the present site of the barrio of Maitum: Provided, That the boundary of this new municipality shall be more particularly denned as follows:
"Beginning at a point on the mouth of Malisbong River in the Celebes Sea; thence following its course upstream till it reaches the boundary line of the municipalities of Bañga and Kiamba; thence following the said boundary to a certain point intersected by the line going south, the declared boundary of the Proposed municipality; thence going south to the headwaters of Pañgi River; thence following the Pañgi River downstream to its mouth in the Celebes Sea; thence following the coastline north-westward of the Celebes Sea to the mouth of Malisbong River, the point of beginning."