Committee Substitute for S. B. 603 - A Bill to amend and reenact §22A-2-43 of the Code of West Virginia, 1931, as amended, relating to testing for the presence of methane in underground mines; requiring automatic de-energization or shut down of equipment when a machine-mounted methane monitor indicates a methane concentration of one and five-tenths percent; and removing the requirement that the Board of Coal Mine Health and Safety promulgate a legislative rule defining the term “sustained period”.