[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: 30CFR7.81] [Page 28] TITLE 30--MINERAL RESOURCES CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR PART 7--TESTING BY APPLICANT OR THIRD PARTY--Table of Contents Subpart E--Diesel Engines Intended for Use in Underground Coal Mines Sec. 7.81 Purpose and effective date. Source: 61 FR 55504, Oct. 25, 1996, unless otherwise noted. Subpart A general provisions of this part apply to this subpart E. Subpart E establishes the specific engine performance and exhaust emission requirements for MSHA approval of diesel engines for use in areas of underground coal mines where permissible electric equipment is required and areas where non-permissible electric equipment is allowed. It is effective November 25, 1996.