Indonesia, Philippines to Ratify Landmark Maritime Boundary Deal

Southeast Asian Nations leaders pose for photos during the opening ceremony of the 34th Association of Southeast Asian Nations (ASEAN) summit in Bangkok on June 23.

Photographer: Tang Chhin Sothy/AFP via Getty Images

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Indonesia and the Philippines said they will begin to ratify a deal in August to establish a boundary between overlapping so-called exclusive economic zones.

The deal, which was signed in May, will bolster economic ties by determining the limits of borders in the Mindanao and Celebes seas -- marking the end of 20 years of negotiations.