Section 27. (1) If any question arises between the Chief Inspector or the Inspector and the manager of any mine

27. (1) If any question arises between the Chief Inspector or the Inspector and the manager of any mine as to whether any person is a child, the question shall, in the absence of a certifioate as to thc a8ge of such person granted in the prescribed manner, be referred by the Chief Inspector or the Inspector for decision to a qualified medical practitioner. Disputes as (2) Every certificate as to the age of a person which has been granted in the prescribed manner and any certificate granted by a qualified medical pra~titioner on a reference under sub-section (I) shall, for the purposes of this Act, be conclusive evidence as to the age of the person to whom it relates. 28. For every mine there shall be kept in the prescribed form and place a register of all persons employed in the mine, of their hours of work, of their days of rest, and of the nature of their respective employments.