{"data":{"id":"us/30-cfr-7.91","jurisdiction":"us","citation":"30 CFR 7.91","heading":"Post-approval product audit.","body":"Upon request by MSHA, but no more than once a year except for cause, the approval holder shall make a diesel engine available for audit at no cost to MSHA.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS","PART 7—TESTING BY APPLICANT OR THIRD PARTY","Subpart E—Diesel Engines Intended for Use in Underground Coal Mines"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"c410fb283a3f9786bac928ee7c43d8dc310712ecd7f55557c55e6a020bc8f2ed","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-7.90","next":"us/30-cfr-7.92"},"notice":"GroundRules: Original legal text. Not legal advice."}