Article 8 - Radio signal
1. The radio signal shall consist of the urgency signal and the distinctive signal as described in the International Telecommunication Union (ITU) Radio Regulations (RR Articles 40 and N 40). 2. The radio message preceded by the urgency and distinctive signals mentioned in paragraph 1 shall be transmitted in English at appropriate intervals on a frequency or frequencies specified for this purpose in the Radio Regulations, and shall convey the following data relating to the medical transports concerned:
(a) call sign or other recognized means of identification;
(c) number and type of vehicles;
(d) intended route;
(e) estimated time en route and of departure and arrival, as appropriate;
(f) any other information, such as flight altitude, guarded radio frequencies, languages used 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 and 25 to 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. The International Telecommunication Union shall be notified of these frequencies in accordance with procedures approved by a World Administrative Radio Conference.