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Archipelagic Sea Lanes and Air Routes. - The system of archipelagic sea lanes of the Philippines and the air routes thereabove shall be defined by connecting the coordinates of the following axis lines:
(a) Philippine Sea - Balintang Channel - West Philippine Sea.
(b) Celebes Sea - Sibutu Passage - Sulu Sea - Cuyo East, Pass - Mindoro Strait - West Philippine Sea.
(c) Celebes Sea - Basilan Strait - Sulu Sea - Nasubata Channel - Balabac Strait - West Philippine Sea.
Passage through the said sea lanes and air routes may be undertaken in both directions between the entry and exit points.
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