The principal ports of entry shall be located in Aparri, San Fernando, Manila, Manila International Container Port, Ninoy Aquino International Airport, Subic, Clark, Batangas, Legaspi, Iloilo, Cebu, Tacloban, Surigao, Cagayan de Oro, Zamboanga, Davao, Limay and such other ports that may be created pursuant to this Act.