{"data":{"id":"us/30-cfr-27.5","jurisdiction":"us","citation":"30 CFR 27.5","heading":"Letter of certification.","body":"(a) Upon completion of investigation of a methane-monitoring system, or component or subassembly thereof, MSHA will issue to the applicant either a letter of certification or a written notice of disapproval, as the case may require If a letter of certification is issued, no test data or detailed results of tests will accompany it. If a notice of disapproval is issued, it will be accompanied by details of the defects, with a view to possible correction. MSHA will not disclose except to the applicant or his authorized representative, any information because of which a notice of disapproval has been issued.\n(b) A letter of certification will be accompanied by an appropriate cautionary statement specifying the conditions to be observed for operating and maintaining the device(s) and to preserve its certified status.","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 27—METHANE-MONITORING SYSTEMS","Subpart A—General Provisions"],"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":"0357aeefe379cc8c8c9c03c0aafef35d0662e59bff861016f337bb92eb3679d8","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-27.4","next":"us/30-cfr-27.6"},"notice":"GroundRules: Original legal text. Not legal advice."}