44 OG No. 3, 831 (March 1948)
The boundary line between the municipality Mahinog, as herein organized, and the municipality of Mambajao shall be the course of the Tupsan River from the point where it intersects the present Mambajao-Catarman boundary line, downstream and in a northeasterly direction to the mouth of this river on the shore of the Mindanao Sea .
The municipality of Mambajao shall consist of its present territory, minus the territory comprised in the municipality of Mahinog , as herein organized.
The organization herein made shall take effect on July 1, 1948 .
Done at the City of Manila, this 19th day of March, in the year of Our Lord, nineteen hundred and forty-eight, and of the Independence of the Philippines, the second.
(Sgd.) MANUEL ROXAS President of the Philippines By the President: (Sgd.) EMILIO ABELLOChief of the Executive Office