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DOL/MSHA RIN: 1219-AC05 Publication ID: 2026 
Title: Improving and Eliminating Regulations; Diesel Particulate Matter Emission Limits in Underground Coal Mines 
Abstract:

The Mine Safety and Health Administration (MSHA) proposes to revise 30 CFR part 72 by removing outdated requirements for permissible diesel-powered equipment operated in underground coal mines.  These revisions would streamline the requirements for underground coal mine operators while maintaining the same level of protections for miners who work with such equipment.  The NPRM was published on July 1, 2025.

 
Agency: Department of Labor(DOL)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
EO 14192 Designation: Deregulatory 
CFR Citation: 30 CFR 72.500    30 CFR 72.501   
Legal Authority: 30 U.S.C. 811, 813(h), 957   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  07/01/2025  90 FR 28418   
NPRM Comment Period End  07/31/2025 
Final Rule  07/00/2026 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: None 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Jessica Senk
Acting Director, Office of Standards, Regulations, and Variances
Department of Labor
Mine Safety and Health Administration
200 Constitution Avenue NW,
Washington, DC 20210
Phone:202 693-9440
Fax:202 693-9441
Email: senk.jessica@dol.gov