{"data":{"chapter":"I","heading":"Certificates of approval; contents.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-B/part-28/subpart-C/section-28.21","part":"28","subchapter":"B","subpart":"C","id":"28.21","citation":"30 CFR 28.21","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS","partHeading":"PART 28—FUSES FOR USE WITH DIRECT CURRENT IN PROVIDING SHORT-CIRCUIT PROTECTION FOR TRAILING CABLES IN COAL MINES","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"}}}