CFR›Title 30›Chapter I›Part 33 ContainsSubparts A–CCorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 33—DUST COLLECTORS FOR USE IN CONNECTION WITH ROCK DRILLING IN COAL MINES Subparts A Subpart A—General Provisions Sections 33.1–33.13 B Subpart B—Dust-Collector Requirements Sections 33.20–33.23 C Subpart C—Test Requirements Sections 33.30–33.38 Authority30 U.S.C. 957, 961.SourceSchedule 25B, 25 FR 6473, July 9, 1960, unless otherwise noted. Previous 28 Part 28—Fuses for Use with Direct Current in Providing Short-Circuit Protection for Trailing Cables in Coal Mines Next 35 Part 35—Fire-Resistant Hydraulic Fluids