Posted By Terry Smyth Tony See below relevant extract from BS5306 Part 3; I hope this answers your question? Regards Terry 5.2 Maintenance records A maintenance record should be kept of the basic and extended maintenance performed. The maintenance record should be indelibly marked on a durable label that is fixed firmly to the extinguisher without obscuring any of the manufacturer’s markings and instructions. Where there is no more space on the maintenance label and a new label is fixed, the date of the last extended service should be marked on the new label. The following information should be given on the maintenance label: a) type of maintenance (basic service, extended service, recharge, overhaul); b) name and address of the maintenance supplier; c) a mark clearly identifying the competent person; d) the date (year and month) of the maintenance; e) the measured mass of the extinguisher, if it is a stored pressure extinguisher or cartridge-operated powder extinguisher; f) the date (year and month) of any overhaul. NOTE 1 It might also be appropriate to mark the year and month of the next maintenance. The information recommended in items a) to f) should be readable without any special equipment. Any additional information for the benefit of competent persons may be shown in a more compact form, such as bar codes. NOTE 2 The information on the maintenance label of each extinguisher may also be entered into a central record. In this way one aspect of the important information on fire prevention can be kept readily available.