{"data":{"id":"us/30-cfr-7.90","jurisdiction":"us","citation":"30 CFR 7.90","heading":"Approval marking.","body":"Each approved diesel engine shall be identified by a legible and permanent approval marking inscribed with the assigned MSHA approval number and securely attached to the diesel engine. The marking shall also contain the following information:\n(a) Ventilation rate.\n(b) Rated power.\n(c) Rated speed.\n(d) High idle.\n(e) Maximum altitude before deration.\n(f) Engine model number.","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":"f6ef3d80520a77ab4abb8c383497fb6621e0eb0a217574043b94d2354297f290","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-7.89","next":"us/30-cfr-7.91"},"notice":"GroundRules: Original legal text. Not legal advice."}