Section 247(4) in The Coal Mines Regulations, 2017
(4)Notwithstanding anything contained in sub-regulation (2), the Chief Inspector may, where special conditions exist, permit or require appointment of any person, not necessarily holding either a Manager's Certificate or Overman's Certificate or a Sirdar's Certificate as a competent person under regulation 130, if such person possess otherwise a suitable qualification and experience for effective supervision of the working places.
