Section 28. If in any inquiry or proceeding under this Act it is necessary to decide the question whether a pers

28. If in any inquiry or proceeding under this Act it is necessary to decide the question whether a person is or is not under the age of twelve years, a certificate in writing, signed by a duly qualified person practising medicine or surgery, who states that he has examined such person, and that the age of such person, as nearly as can be ascertained from such Prosecution of owner, agent or manager. Limitation of prosecutions. Cognizance of offences. Reference to Mining Board or Committee in lieu of prosecution in certain cases. Decision of question whether a mine is under this Act. Evidence of age. 144 Mines. [ACT VIII (Miscellaneous.—Sections 29-32. Temporary Provision.—Section 33.) such examination, is or is not under twelve years, shall be received as *primá facie* evidence of the age of such person. Power to exempt from operation of Act.