travelling to the Philippines for business and tourism purposes are allowed to enter the Philippines obtaining visa on arrival for a stay not exceeding 30 days, provided they hold valid tickets for their return journey to port of origin or next port of destination. However, immigration officers at ports of entry may exercise their discretion to admit holders of passports valid for at least sixty days beyond the intended period of stay. Customs Upon arriving, visitors are allowed to bring in duty-free personal belongings, two cartons of cigarettes or two tins of pipe tobacco and up to one liter of alcohol. Exceeding this is illegal. Balikbayans have separate rules and should check with the embassy or consulate in their home city. Currency regulations It is illegal for any incoming or outgoing passenger to bring in or out Philippine pesos in excess of P10,000.00 without prior authority from the Bangko Sentral ng Pilipinas. Any violation of this rule may lead to its seizure and civil penalties and / or criminal prosecution. The transportation of foreign currency or monetary instruments is legal. However, the carrying of foreign currency in excess of US$10,000.00 or its equivalent in other foreign currencies must be declared to a Customs Officer or the Bangko Sentral ng Pilipinas. Violation of this rule may lead to seizure and sanctions, fines and / or penalties. Transportation Air transportation Currently, there are 16 airports classified by the Civil Aviation Authority of the Philippines as International Airports. There are also hundreds of principal domestic airports and community airports throughout the country. The international airports include: Bacolod–Silay International Airport in Silay, Negros Occidental Bicol International Airport in Legazpi, Albay Bohol–Panglao International Airport in Panglao, Bohol Cagayan North International Airport in Lal-lo, Cagayan Clark International Airport in Mabalacat, Pampanga Francisco Bangoy International Airport in Davao City General Santos International Airport in General Santos Iloilo International Airport in Cabatuan, Iloilo Kalibo International Airport in Kalibo, Aklan Laguindingan International Airport in Laguindingan, Misamis Oriental Laoag International Airport in Laoag, Ilocos Norte Mactan–Cebu International Airport in Lapu-Lapu City, Cebu Ninoy Aquino International Airport in Pasay / Parañaque Puerto Princesa International Airport in Puerto Princesa Subic Bay International Airport in Morong, Bataan Zamboanga International Airport in Zamboanga City Sea transportation The country traditionally used sea vehicles since pre-colonial times. The archipelagic country has four areas of ports concentration, as administered by the Philippine Ports Authority. These areas are