Nothing in this subchapter shall be construed to affect the authority of the Secretary of Transportation that may exist prior to August 8, 2005, with respect to—
(1)
research into, and regulation of, hydrogen-powered vehicles fuel systems integrity, standards, and safety under subtitle
VI of title
49;
(2)
regulation of hazardous materials transportation under chapter
51 of title
49;
(3)
regulation of pipeline safety under chapter
601 of title
49;
(4)
encouragement and promotion of research, development, and deployment activities relating to advanced vehicle technologies under section
5506 of title
49;
(5)
regulation of motor vehicle safety under chapter
301 of title
49;
(6)
automobile fuel economy under chapter
329 of title
49; or
(7)
representation of the interests of the United States with respect to the activities and programs under the authority of title 49.