31. An employer shall ensure that—

(a) throughout its working life work equipment is kept, by means of adequate maintenance, at a level such that it complies with the provisions of this Chapter,

(b) where possible, maintenance operations are carried out when work equipment is shut down, and where this is not possible, appropriate protection measures are taken for the carrying out of such operations or such operations are carried out outside the area of danger,

(c) work equipment is maintained in such a way as to reduce the risks to users of the work equipment and to other persons at work, and

(d) a maintenance log for any machine is kept up to date.