58.—(1) The mine operator must ensure that there is appointed a suitably qualified and competent person as surveyor of the mine at all times during any period when—
(a)mineral is being extracted from the mine, or such extraction is proposed; or
(b)there is significant excavation at the mine, or such excavation is proposed.
(2) Where for any reason a person appointed under paragraph (1) ceases to be the surveyor of the mine during any period mentioned in that paragraph, within a reasonable time after the appointment ceases the mine operator must appoint another suitably qualified and competent person to be surveyor of the mine.
(3) If, for any reason, no appointment has been made under paragraph (2) within a reasonable time, the only work that may be carried out below ground at the mine is work that is essential to the maintenance of the safety of the mine.