From the Introduction: "The federal pipeline safety program is administered by the Department of Transportation's (DOT's) Pipeline and Hazardous Materials Safety Administration (PHMSA), working in partnership with state pipeline safety regulators. Together, the federal and state pipeline safety agencies administer a comprehensive set of regulatory authorities to ensure the safety of the nation's expansive network of hazardous liquid (e.g., crude oil) and natural gas pipelines. Under the Protecting Our Infrastructure of Pipelines and Enhancing Safety Act of 2016 (P.L. 114-183), funding authorization for PHMSA's pipeline safety program is set to expire after the fiscal year ending September 30, 2019. Congress is debating at what levels the program should be funded for the next four years. The Trump Administration has proposed a reduction in PHMSA pipeline safety funding whereas bills in the House and Senate propose differing increases."
CRS Insight, IN11162
Congressional Research Service: https://crsreports.congress.gov/