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68.—(1) The mine operator must ensure that—
(a)every report or record which is required to be made under these Regulations is in a suitable form and is kept at the mine or at some other suitable place for at least three years from the date on which the report or record was made unless the provision concerned expressly imposes some other requirement; and
(b)a copy of the written statement of duties of all persons appointed at the mine under these Regulations is kept at the mine or at some other suitable place for at least 12 months after the date on which the appointment ceased to have effect.
(2) Paragraph (1)(a) applies to copies of information notified to the Executive under these Regulations but does not apply to the record made in accordance with regulation 5(3) by the owner.
69.—(1) Where the mine operator gives a notice of abandonment, the mine operator must, within three months of the date on which the mine is abandoned or the tip is closed, send to the Executive, or a body approved by it, an accurate plan of that mine or tip (as the case may be).
(2) Where a plan has been sent to the Executive or a body approved by it under paragraph (1), that plan must be retained by the Executive or that body in accordance with arrangements approved by the Executive.
70.—(1) Subject to paragraph (4), the Executive may, by a certificate in writing, exempt any mine, part of a mine or class of mines, any person or class of persons, any plant or equipment or class of plant or equipment, or any operation or class of operations from all or any of the requirements and prohibitions in these Regulations.
(2) An exemption granted under paragraph (1) may be—
(a)subject to conditions; and
(b)subject to a time limit.
(3) An exemption granted under paragraph (1) may be revoked at any time by a certificate in writing.
(4) The Executive may not grant an exemption under paragraph (1) unless it is satisfied that the health and safety of persons who are likely to be affected by the exemption will not be prejudiced in consequence of it, having regard to the circumstances of the case and in particular to—
(a)the conditions (if any) it proposes to attach to the exemption; and
(b)any other requirements imposed by or under any enactment which apply to the case.