Air defense identification zone
An air defense identification zone (ADIZ) is a region of airspace in which a country tries to identify, locate, and control aircraft in the interest of national security.
[3][4] The first ADIZ was established by the United States on December 27, 1950, shortly after President Truman had proclaimed a national emergency during the Korean War.
[1] Canada operates two other sections of the North American ADIZ, one off the Pacific coast of British Columbia and another that encompasses the Canadian Arctic Archipelago and its Atlantic provinces.
It was created by the United States Armed Forces (USAF) after World War II, with the western border at 123° degrees east.
MOFA minister at the time, Timothy Yang, also said "each country is entitled to draw its ADIZ" and that he believes "[Taiwan and Japan] understand each other's position."
MOFA ministry spokesman at the time, Henry Chen, said that the government would not make "any concession on this issue as it is a matter of national sovereignty."
It was designed and created by the United States Armed Forces (USAF) after World War II and the basis of Taipei Flight Information Region.
[11][12]: 15 Around 9% of Taiwan's national defence budget in 2020 reportedly goes into the response to Chinese sorties, which usually involve flights inside the southwest part of the ADIZ, crossing of the median, or circumnavigation.
The line was avoided by the PRC until 1999 when groups of PLAAF aircraft crossed over in response to "state-to-state" comments made by Lee Teng-hui.
If there is a change in the flight passage or an approach without prior notification, the South Korean Air Force has the right to immediately identify or to track down the aircraft and to be prepared for interception.
Aircraft and surface-to-air missiles of the IAF, with elements of the Army and the Navy participating in their specific areas, where required, carry out interceptions.
Civil aviation authorities, in conjunction with the IAF, also assist in this process by ensuring regulatory and control measures, such as assignment of Air Defence Clearance (ADC) numbers to aircraft entering or operating in Indian air space and by confirming the ADC of the incoming traffic, where necessary.
Among other procedures, aircraft flying without a valid ADC number or failing to comply with any restriction or deviating from flight plan will be liable to interception by Bangladesh Air Force.
