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49 CFR Parts 100 - 199

This section provides interpretations related to PHMSA’s safety regulations, as well as regulations parts identified by the part number and subject. To view interpretations related to the part number, select the hyperlink on the right. These interpretations are specific to the scenarios in which they are responding to and may not be applicable to different fact scenarios. To browse regulation sections by part, click on the subject link below to access the eCFR website to view part sections.

You can also browse PHMSA interpretations using the browser to the left. Click the glass icon to search by keyword, Orders of the Chief Counsel, regulation part/section or reference ID. You can also use the filter icon to view a list of interpretations related specifically to pipeline safety or hazardous materials safety. The "<" and ">" icons will collapse and expand the interpretations browser.

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