39B. Medical standards- (1) No licence or rating referred to in rule 38, required for any of the personnel of the aircraft, shall be issued or renewed unless the applicant undergoes a medical examination with an approved medical authority and satisfies the medical standards as notified by the Director-General:

Provided that if in the opinion of the approved medical authority the condition of the applicant is not such as to introduce any hazard either of sudden incapacity or of inability to perform his duties safely during the period of validity of his licence or rating and failure to attain the requirement is capable of being compensated and the Director-General has satisfactory evidence that the applicant has already acquired and demonstrated his ability, skill and experience which compensate for his deficiency, the licence or rating may be renewed or endorsed with any special limitation when the safe performance of flight duties is dependent on compliance with such limitations :

Provided further that, in the case of a member of the operating crew of an aircraft engaged in public transport or aerial work who is on duty in the territory of a foreign country where medical centres recognized by the Director-General do not exist, the Director-General may renew the licence or rating for two consecutive periods of three months each without the candidate having successfully undergone the prescribed medical examination if such candidate produces a medical certificate from a registered practitioner in modern medicine declaring his fitness in accordance with the prescribed medical standards.

Explanation- For the purposes of this sub-rule 'approved medical authority' means a medical authority approved by the Director-General.

(2) The Director-General may require a member of any flight crew to undergo a medical examination by any Medical Authority at any time, if, in his opinion, such examination is necessary in the interest of safety of operations.