MOP, Bk 8 Pt.1, v.4, 253
From the point of the Davao Gulf Where the water of said Gulf meets the land at high tide exactly west of BBM No. 10, Cad. 275, westward to said BBM No. 10, thence in a straight line to BBM No. 18, Cad. 273, thence in a straight east to west line to the point of the intersection of this line with the Cotabato-Davao boundary.The boundary of the municipality of Sulop in the south shall be the Padada-Malalag boundary as defined in Republic Act No. 1008, as follows:
From east to west, the Balasinon . River from the Gulf of Davao to Km. 327 of the Digos-Malalag-Makar Road and a straight line along latitude 6° 35' from the said Km. 327 to the boundary line between the provinces of Davao and Cotabato.” (Based upon Republic Act No. 1008 and the sketch plan of the proposed municipality of Sulop submitted to this office with Provincial Board Resolution No. 31, current series.)The municipality of Padada shall have its present territory minus the portions thereof which are included in the municipality of Sulop.