Unlock Advanced Research with PRISMAI Integrated with over 4 crore judgments and laws — designed for legal practitioners, researchers, students and institutions - Know your Kanoon - Doc Gen Hub - Counter Argument - Case Predict AI - Talk with IK Doc - ... Upgrade to Premium Document Options Get in PDF Print it! [Cites 0, Cited by 0] [Section 235] [Entire Act] Union of India - Subsection Section 235(3) in The Coal Mines Regulations, 2011 (3)Main air line shall be provided with suitable isolating valve in the underground so located that air supply to underground can be effectively and quickly stopped if required.