1.1 The authority responsible for the overall administration of air traffic services is the Assistant Director-General of Civil Aviation (Air Traffic Management) acting under the authority of the Director-General of Civil Aviation.

2.1 Air traffic services are provided for the entire territory of Hong Kong including the territorial waters and the airspace over the South China Sea as listed in ENR 2.1, notified by AIP Supplement or promulgated by NOTAM.

3.1 Air traffic services for both military and civil traffic in Hong Kong airspace are provided by the Civil Aviation Department, administered by the Assistant Director-General of Civil Aviation (Air Traffic Management) at Hong Kong International Airport.

3.2 The airspace of Hong Kong, including adjacent international waters, comprises a single area and is listed in ENR 2.1. Air Traffic Control is exercised in all controlled airspace; there is no distinction between upper and lower airspace. All flight information, air traffic control and alerting services are provided by one air traffic services unit (Hong Kong ATC).

3.3 A control zone is established at Hong Kong International Airport. Flight information, air traffic control and alerting services within the control zone are provided by approach/zone/aerodrome control.

3.4  ENR 1.4 describes the airspace classification for air traffic service purposes.

3.5 Airspace restrictions and hazardous areas are set out in ENR 5.

4.1 Co-ordination between the operator and air traffic services is effected in accordance with ICAO Annex 11, Chapter 2, para 2.17 and Procedures for Air Navigation Services - Air Traffic Management (Doc 4444, PANS-ATM). 

5.1 The minimum flight altitude on the ATS routes listed in ENR 3.1 have been determined so as to ensure at least 1 000 ft vertical clearance above the highest known obstacle within the lateral limits of the route within the Hong Kong FIR and the adjacent areas of adjoining FIRs.