The holder of any licence granted under these Regulations in respect of any radio station equipped with obstruction lights, shall

(a) inspect the mast or tower light at least once every 24 hours to ensure that the lights function properly as required under these Regulations;

(b) inspect at intervals of not more than three months all automatic or manual control devices, indicators and the alarm system connected with the mast or tower lighting system;

(c) report immediately to the Civil Aviation Authority or to the nearest flight service station

 (i) any observed or know improper functioning of the lighting system which cannot be corrected within thirty minutes; and

(ii) when the fault referred to in subparagraph (i) is corrected; and

          (d) maintain sufficient quantity of lamps for immediate replacement at all times