83.—(1) Subject to paragraphs (3) and (4), a person shall not act as an air traffic controller or hold himself out, whether by use of a radio call sign or in any other way, as a person who may so act unless he is the holder of, and complies with the terms of:
(a)a valid student air traffic controller’s licence granted under this Order and he is supervised in accordance with article 81(6) of this Order;
(b)a valid air traffic controller’s licence so granted authorising him to provide that type of service at that place or for that sector and with the type of radar equipment being used (if any); or
(c)a valid air traffic controller’s licence so granted which does not authorise him to provide that type of service at that place or for that sector and with the type of radar equipment being used (if any) but he is supervised as though he was the holder of a student air traffic controller’s licence.
(2) A person shall not act as an air traffic controller unless he has identified himself in such a manner as may be notified.
(3) A licence shall not be required by any person who, acting in the course of his employment, passes on such instructions or advice as he has been instructed so to do by the holder of an air traffic controller’s licence which entitles that holder to give such instructions or advice.
(4) Nothing in this article shall prohibit the holder of a valid air traffic controller’s licence from providing at any place or for any sector for which the licence includes a valid certificate of competence, information to aircraft in flight in the interests of safety.