CIQ (Custom Immigration Quarantine) is passengers who passed through the immigration and luggage check by custom, ready for departure. For example, the passengers from Phuket or Chiang Mai who are traveling abroad, the Passport control and luggage security check can be done from the original flight, the passengers will have the CIQ sticker on their chests. When they arrive to the Suvarnabhummi Airport, the passengers will be separated and can directly go boarding.