SAFEGUARDS 56J covering, life-saving means or appliances, lights, marks, stages or other things whatsoever required by these Regulations to be provided. If removed, such things shall be restored at the end of the period during which their removal was neecssary by the persons last engaged in the work that necessitated such removal The fencing required by the Regulations shall not be removed except to the extent and for the period reasonably necessary for carrying on the work of the dock or ship, or for repairing any fencing. If removed it shall be restored forthwith at the end of that period by the persons engaged in the work that necessitated its removal. Every person employed, shall use the means of access provided in accordance with the Regulations, and no person shall authorise or order another to use means of access other than those provided in accordance therewith. No person shall go upon the fore and aft beams or thwartship beams for the purpose of adjusting the gear for lifting them on and off nor shall any person authorise or order another to do so. LIFTING GEAR. (a) All lifting machinery shall have been tested and examined by a competent person in the manner set out in the Schedule to these Regulations before being taken into use. (6) (i.) All derricks and permanent attachments, including bridle chains, to the derrick, mast and deck, used in hoisting or lowering shall be inspected once in every twelve months and be thoroughly examined once at least in every four years. (ii.) All other lifting machinery shall be thoroughly examined once at least every twelve months. (iii.) For the purposes of this Regulation thorough examination means a visual examination, supplemented if necessary by other means such as a hammer test, carried out as carefully as the conditions permit, in order to arrive at a reliable conclusion as to the safety of the parts examined ; and if necessary for the purpose, parts of the machines and gear must be dismantled. (a) No chain, ring, hook, shackle, swivel or pulley block shall be used in hoisting or lowering unless it has been tested and examined by a competent person in the manner set out in the Schedule to these Regulations.