U.S. Code of Federal Regulations

Regulations most recently checked for updates: Sep 17, 2025

All TitlesTitle 30Chapter IPart 7Subpart E - Subpart E—Diesel Engines Intended for Use in Underground Coal Mines
§ 7.81 - Purpose and effective date.
§ 7.82 - Definitions.
§ 7.83 - Application requirements.
§ 7.84 - Technical requirements.
§ 7.85 - Critical characteristics.
§ 7.86 - Test equipment and specifications.
§ 7.87 - Test to determine the maximum fuel-air ratio.
§ 7.88 - Test to determine the gaseous ventilation rate.
§ 7.89 - Test to determine the particulate index.
§ 7.90 - Approval marking.
§ 7.91 - Post-approval product audit.
§ 7.92 - New technology.
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