[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: 30CFR23.13] [Page 139] TITLE 30--MINERAL RESOURCES CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR PART 23--TELEPHONES AND SIGNALING DEVICES--Table of Contents Sec. 23.13 Withdrawal of approval. MSHA reserves the right to rescind for cause at any time any approval granted under this part.