h 1 shall convey the following data:
(a) Call sign of the medical transport;
(b) Position of the medical transport;
(c) Number and type of medical transports;
(d) Intended route;
(e) Estimated time en route and of departure and arrival, as appropriate;
(f) Any other information such as flight altitude, radio frequencies guarded, languages and secondary surveillance radar modes and codes.
3. In order to facilitate the communications referred to in paragraphs 1 and 2, as well as the communications referred to in Articles 22, 23, 25, 26, 27, 28, 29, 30 and 31 of the Protocol, the High Contracting Parties, the Parties to a conflict, or one of the Parties to a conflict, acting in agreement or alone, may designate, in accordance with the Table of Frequency Allocations in the Radio Regulations annexed to the International Telecommunication Convention, and publish selected national frequencies to be used by them for such communications. These frequencies shall be notified to the International Telecommunication Union in accordance with procedures to be approved by a World Administrative Radio Conference.
Article 8
Electronic identification
1. The Secondary Surveillance Radar (SSR) system, as specified in Annex 10 to the Chicago Convention on International Civil Aviation of 7 December 1944, as amended from time to time, may be used to identify and to follow the course of medical aircraft. The SSR mode and code to be reserved for the exclusive use of medical aircraft shall be established by the High Contracting Parties, the Parties to a conflict, or one of the Parties to a conflict, acting in agreement or alone, in accordance with procedures to be recommended by the International Civil Aviation Organization.
2. Parties to a conflict may, by special agreement between them, establish for their use a similar electronic system for the identification of medical vehicles, and medical ships and craft.
Chapter IV. COMMUNICATIONS
Article 9
Radiocommunications
The priority signal provided for in Article 7 of these Regulations may precede appropriate radiocommunications by medical units and transports in the application of the procedures carried out under Articles 22, 23, 25, 26, 27, 28, 29, 30 and 31 of the Protocol.
Article 10
Use of international codes
Medical units and transports may also use the codes and signals laid down by the International Telecommunication Union, the International Civil Aviation Organization and the Inter-Governmental Maritime Consultative Organization. These codes and signals shall be used in accordance with the standards, practices and procedures established by these Organizations.
Article 11
Other means of communication
When two-way radiocommunication is not possible, the signals provided for in the International Code of Signals adopted by the Inter-Governmental Maritime Consultative Organization or in the appropriate Annex to the Chicago Convention on International Civil Aviation of 7 December 1944, as amended from time to time, may be used.
Article 12
Flight plans
The agreements and notifications relating to flight plans provided for in Article 29 of the Protocol shall as far as possible be formulated in accordance with procedures laid down by the International Civil Aviation Organization.
Article 13
Signals and procedures for the interception
of medical aircraft
If an intercepting aircraft is used to verify the identity of a medical aircraft in flight or to require it to land in accordance with Articles 30 and 31 of the Protocol, the st
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