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DOL/MSHA RIN: 1219-AB39 Publication ID: Spring 2006 
Title: Field Modifications of Permissible Mobile Diesel-Powered Equipment 
Abstract: The Mine Safety and Health Administration is proposing to add field modification provisions to part 36 - Approval requirements for permissible mobile diesel-powered transportation equipment. Field modifications allow permissible equipment to be modified for mine-specific use or to comply with new diesel standards. The implementation of diesel regulations in 30 CFR parts 7, 36, 57, 72, and 75 has resulted in an increase in requests from owners of approved equipment, typically underground mine operators, to field modify permissible diesel-powered equipment. This proposed rule would codify the field modification process for part 36 field modification acceptances, expand the field modification process to allow mine operators as defined in the Federal Mine Safety and Health Act 1977 to apply for field modifications, and continue to ensure that field-modified equipment operates safely in gassy underground mines. The proposed rule would implement existing policy which dates from 1985 to reflect current procedures for processing field modifications related to mobile diesel-powered transportation equipment. Also, the proposed rule would require that labeling provisions be applied to all new field modifications accepted under part 36. These new provisions would enhance miner safety. 
Agency: Department of Labor(DOL)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 30 CFR 36   
Legal Authority: 30 USC 957    30 USC 961   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  08/00/2006    
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
Agency Contact:
Patricia W. Silvey
Director, Office of Standards, Regulations, and Variances
Department of Labor
Mine Safety and Health Administration
Room 631, 1100 Wilson Boulevard, Room 2350,
Arlington, VA 22209-3939
Phone:202 693-9440
Fax:202 693-9441
Email: silvey.patricia@dol.gov