[Code of Federal Regulations] [Title 29, Volume 9] [Revised as of July 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 29CFR2700.21] [Page 682] TITLE 29--LABOR CHAPTER XXVII--FEDERAL MINE SAFETY AND HEALTH REVIEW COMMISSION PART 2700_PROCEDURAL RULES--Table of Contents Subpart B_Contests of Citations and Orders Sec. 2700.21 Effect of failure to file notice of contest of citation. An operator's failure to file a notice of contest of a citation or order issued under section 104 of the Act, 30 U.S.C. 814, shall not preclude the operator from challenging, in a penalty proceeding, the fact of violation or any special findings contained in a citation or order including the assertion in the citation or order that the violation was of a significant and substantial nature or was caused by the operator's unwarrantable failure to comply with the standard.