CFR›Title 46›Chapter I›Part 25›Subpart 25.40 ContainsSection 25.40-1CorpusDaily eCFRDisplayed edition2026-09-25Last updated2026-09-25 Subpart 25.40—Ventilation Sections 25.40-1 § 25.40-1 Tanks and engine spaces. Previous 25.35 Subpart 25.35—Backfire Flame Control Next 25.45 Subpart 25.45—Cooking, Heating, and Lighting Systems