121.—(1) In vessels of 24·4 metres in length and over to which these Rules apply life-saving and fire appliances and equipment shall be inspected when musters of the crew are held, and in any case at intervals of not more than one month to ensure that all equipment is in good condition and always ready for immediate use.
(2) In vessels of 12 metres in length and over but less than 24.4 metres in length to which these Rules apply inspections of the life-saving equipment and fire appliances shall be made at intervals of not more than one month.