(a) the licensee shall pass an examination in the safe handling and use of a category H firearm conducted by an authorised instructor at least once in every 12 month period for which the licence is in force;
(b) a licensee shall not undertake an examination referred to in paragraph (a) that he or she has failed 3 times;
(c) a licensee who has failed an examination referred to in paragraph (a) shall pass that examination within a period of 14 days after the day on which the first failure occurred.