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NO ONE may smoke within 25 feet of any vehicle that contains explosives, oxidizers, or

You should not risk smoking in close proximity to any class of hazardous material. However, there are specific rules for the following classes: No smoking within 25 feet of classes 3 and 2.1 (flammable materials and gases). No smoking or holding a lighted smoking object such as a cigar or pipe within 25 feet of classes 1, 3, 4, or 4.2 (explosives, flammable liquids or solids, or spontaneously combustible materials).