Regulation 258The manager of a mine shall, in relation to the mine, ensure that subject to regulation 259, a confined space is entered only where(a) there is an easy egress from all accessible parts of the confined space;(b) mechanical equipment in the confined space is(i) disconnected from its power source, and (ii) locked out;(c) pipes and other supply lines except those required for the work in the confined space are blanked off; and (d) the confined space is tested and evaluated by a competent person who,(i) records the results of each test in a record book, and(ii) certifies in writing in the record book that the confined space, is free from hazard, and will remain free from hazard while any person is in the confined space, having regard to the nature and duration of the work to be performed.