PHMSA will host the THLPSSC meeting in Washington, DC. The THLPSSC will vote on a proposal to extend pipeline safety regulations to certain unregulated hazardous liquid gathering lines and low-stress pipelines, including a supplemental proposal addressing new requirements for low-stress pipelines under the Pipeline Inspection, Protection, Enforcement, and Safety Act of 2006. PHMSA will also consult with the THLPSSC on a concept addressing internal corrosion.