<P> Regulation over airports and aviation in the Philippines lies with the Civil Aviation Authority of the Philippines (CAAP). The CAAP's classification system, introduced in 2008, rationalizes the previous Air Transportation Office (ATO) system of airport classification, pursuant to the Philippine Transport Strategic Study and the 1992 Civil Aviation Master Plan . The list is updated every three years, or as the need arises . </P> <P> In the current classification system all of the 85 airports owned by the national government are placed into one of three main categories: </P> <P> 1 . International airports are airports capable of handling international flights and have border control facilities . Airports in this category include airports that currently serve, or previously served, international destinations . There are currently 11 airports in this category . Ten of these airports were in the initial CAAP list in 2008: Clark, Davao, General Santos, Laoag, Mactan--Cebu, Manila, Kalibo, Puerto Princesa, Subic Bay and Zamboanga . The only airport elevated to international status since 2008 has been the Iloilo Airport, where scheduled international service began in 2012 . </P> <P> 2 . Principal airports are airports which serve domestic destinations . This category is further subdivided into two types: </P>

What are the international airport in the philippines
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