sentences:  DOT under the Norman Y. Mineta Research and Special Programs Improvement Act of 2004, which former United States President George W. Bush signed into law on November 30, 2004.Howard R. Elliott was sworn into office in October 2017, and is the current Administrator.The PHMSA enforces the Natural Gas Pipeline Safety Act of 1968(), which was enacted in response to the Richmond, Indiana, explosion, as well as the Hazardous Liquid Pipeline Act of 1979 (), the Pipeline Safety Improvement Act of 2002, the Pipeline Inspection, Protection, Safety and Enforcement Act (PIPES) Act of 2006, the Pipeline Safety, Regulatory Certainty, and Job Creation Act of 2011 (P.L.