[Code of Federal Regulations] [Title 30, Volume 1] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 30CFR57.7801] [Page 365] TITLE 30--MINERAL RESOURCES CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR PART 57_SAFETY AND HEALTH STANDARDS_UNDERGROUND METAL AND NONMETAL MINES --Table of Contents Subpart F_Drilling and Rotary Jet Piercing Sec. 57.7801 Jet drills. Jet piercing drills shall be provided with: (a) A system to pressurize the equipment operator's cab, when a cab is provided; and (b) A protective cover over the oxygen flow indicator.