ADMINISTRATIVE PROVISIONS RELATING TO THE INTERNATIONAL AERONAUTICAL TELECOMMUNICATION SERVICE
The international aeronautical telecommunication service shall be divided into four parts:
1) aeronautical fixed service;
2) aeronautical mobile service;
3) aeronautical radio navigation service;
4) aeronautical broadcasting service.
TELECOMMUNICATION — ACCESS
All aeronautical telecommunication stations, including end systems and intermediate systems of the aeronautical
telecommunication network (ATN), shall be protected from unauthorized direct or remote access.
HOURS OF SERVICE
The Competent Authority shall give notification of the normal hours of service of stations and offices of the
international aeronautical telecommunication service under its control to the aeronautical telecommunication agencies
designated to receive this information by other Administrations concerned. Whenever necessary and practicable, the Competent Authority shall give notification of any change in the normal
hours of service, before such a change is effected, to the aeronautical telecommunication agencies designated to receive this
information by other Administrations concerned. Such changes shall also, whenever necessary, be promulgated in NOTAM.
If a station of the international aeronautical telecommunication service, or an aircraft operating agency, requests a
change in the hours of service of another station, such change shall be requested as soon as possible after the need for change
is known. The station or aircraft operating agency requesting the change shall be informed of the result of its request as soon
as possible.
SUPERVISION
Each State shall designate the authority responsible for ensuring that the international aeronautical
telecommunication service is conducted in accordance with the Procedures in this Annex.
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