[Code of Federal Regulations] [Title 30, Volume 1] [Revised as of July 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 30CFR27.1] [Page 140] TITLE 30--MINERAL RESOURCES CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR PART 27--METHANE-MONITORING SYSTEMS--Table of Contents Subpart A--General Provisions Sec. 27.1 Purpose. The regulations in this part set forth the requirements for methane- monitoring systems or components thereof to procure certification for their incorporation in or with permissible equipment that is used in gassy mines, tunnels, or other underground workings and procedures for applying for such certification. [31 FR 10607, Aug. 9, 1966, as amended at 52 FR 17515, May 8, 1987]