http://www.legislation.gov.uk/apni/1969/6/section/166Mines Act (Northern Ireland) 1969An Act to make fresh provision with respect to the management and control of mines and for securing the safety, health and welfare of persons employed thereat; to regulate the employment thereat of women and of young persons and certain other persons under the age of twenty-one years; to enable certain tips to be regulated and to require the fencing of abandoned and disused mines; to amend the Quarries Act (Northern Ireland) 1927; and for purposes connected with the matters aforesaid.texttext/xmlenStatute Law Database2018-07-27Expert Participation2018-06-01 Mines Act (Northern Ireland) 1969Sch. 3 para. 9AJustice Act (Northern Ireland) 2016Sch. 2 para. 2s. 61(2)art. 2(c) PART XIII166A person who, immediately before the commencement of this Act, is, by virtue of subsection (3) of section 2 of the Coal Mines Act 1911, exercising and performing, in relation to a mine of coal, stratified ironstone, shale or fireclay then exempt from the provisions of that section, the powers and duties conferred and imposed by that Act on the manager of a mine, may be manager of that mine or another mine of coal, stratified ironstone, shale or fireclay at any time at which the number of persons employed below ground in the mine does not exceed thirty and no direction is in force with respect to the mine under subsection (2)( b) or subsection (3) of section 4, notwithstanding that he does not possess the qualifications required by this Act for appointment as manager thereof.