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(ii) the applicant shall, before each test, furnish the craminers with proof of his identity.
(c) Technical Examination.
(i) General knowledge of the procedure for towed flights, including the systems of intercommunication which may be used; the methods of towing; the effect of variation of load, and of wind and other meteorological conditions on gliding and towed flights, the principles governing the selection of landing grounds for gliders;
(ii) knowledge of the types of gliders approved for towing by such types of flying machines included in Group I of the aircraft rating of the applicant's licence as have been approved for towing: the flight charac- teristics of and the instruments prescribed for such types of gliders; the permissible limits of loading for such combinations of flying machines and gliders; the types of tow rope which may be used; the methods of inspection of tow ropes and quick release devices;
(iii) practical knowledge of aviation law, with parti- cular reference to the Order and the Regulations issued thereunder, also knowledge of any information notified with respect to the responsibilities of a pilot in towing operations:
Provided that-
(1) an applicant who is the holder of a commercial pilot's licence (trailing gliders) may be exempted from technical examination in the subjects specified in sub-paragraph (c) (i) and (iii) of this paragraph; and
(ii) an applicant who has at any time flown as a pilot of flying machines towing gliders in any of Her Majesty's air forces may, according to his qualifica- tions and experience, be exempted from all or any of the above requirements as to flying experience and practical flying tests, and from technical exami- nation in the subjects specified in sub-paragraph (c) (i) and (ii) of this paragraph. Such exemption may be made conditional upon the satisfactory completion of a special flying test.
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PART XII.
FLYING INSTRUCTION.
General.
218. With reference to Article 26 of the Order, application for the inclusion in a licence, extension or renewal of a rating to give instruction in Aying (i) flying machines, and (ii) gliders (of which the maximum total weight authorized exceeds 1,250 lb.) lowed by bying machines, should be made in writing to the Department of Civil Aviation, Hong Kong. Such ratings may be included in a licence, extended or renewed in accordance with the requirements and conditions specified in this Section:
Provided that the requirements for the inclusion in a licence, extension or renewal of a rating to give instruction in the flying of flying machines other than aeroplanes (e.g. helicopters ar gyroplanes), while generally as specified in this Part for flying machines, may be subject to such modifications as the Director may consider appropriate in the particular case.
219. A rating may be included in a licence entitling the holder thereof to give instruction in flying in the capacity either of In- structor or of Assistant Instructor according to the qualifications of the applicant.
220. The period for which a rating to give instruction in flying may continue in operation, following either the inclusion in a licence or any renewal thereof, shall not exceed twelve months.
Flying Machines.
Rating to act us Assistant Instructor.
221. (1) A rating to act in the capacity of Assistant Instructor may be included in a flying machine pilot's licence of any class and will be limited to particular classes and types of flying machines.
(2) A rating in respect of one or more classes or types of flying machines may be extended to cover the giving of instruction în flying additional classes or types on the Director being satisfied that the applicant has completed such examination and rests as may be appropriate in the circumstances of the case.