Civil Aviation Authority, Bangladesh (CAAB) (Bengali: বেসামরিক বিমান চলাচল কর্তৃপক্ষ) functions as the regulatory body for all aviation related activities in Bangladesh. It is the national aviation authority operating under the Ministry of Civil Aviation & Tourism. All nine operational airports (three international and six domestic) are operated by the CAAB. A member of International Civil Aviation Organization, it has signed bilateral air transport agreement with 52 states. It is headquartered in Kurmitola, Dhaka.