RegulationsTitle 49Subtitle BChapter ISubchapter DPart 190Subpart B—Enforcement49 CFR 190.231Regulationhistorical49 CFR 190.231Section 190.231Current as of 2014-10-01 Government sourcePipeline and Hazardous Materials Safety AdministrationOfficial agency materialView source 1 passages[Reserved]Previous§ 190.229