{"data":{"chapter":"I","heading":"Specific requirements for approval.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-B/part-23/section-23.7","part":"23","subchapter":"B","subpart":"","id":"23.7","citation":"30 CFR 23.7","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS","partHeading":"PART 23—TELEPHONES AND SIGNALING DEVICES","subpartHeading":"","text":null},"meta":{"representation":"json","fullCorpus":"/data/title30-sections.json","snapshot":{"chapterCount":6,"featuredSectionCount":100,"latestAmendedOn":"2026-08-14","latestIssueDate":"2026-08-14","partCount":206,"sectionCount":5954,"upToDateAsOf":"2026-08-19"}}}