Regulation 292The engineering manager of a mine shall(a) provide efficient guards for the parts of each machinery and electrical apparatus in the mine that may be a source of danger to persons; and(b) ensure that(i) the guards are kept in position and properly maintained,(ii) where a guard is for the purpose of repairs temporarily removed from that guard's post a guard is sent to that post as soon as the a[sic] guard is sent to that post as soon as the repairs are completed; and(iii) proper precautions are taken for the safety of persons where a guard is temporary employed for the purpose of the repairs.