Authorizes appropriations for FY 2004 through 2007.
Amends the Department of Energy Organization Act to establish within DOE: (1) an Under Secretary for Energy Research and Science, to serve as the Science and Technology Advisor to the Secretary, and to exercise authority and responsibility over Assistant Secretaries implementing energy research and development, and energy technology functions; (2) an Assistant Secretary of Science to head the Office of Science (currently headed by a Director); (3) an additional position for Assistant Secretary; (4) the position of General Counsel; and (5) a Science Advisory Board composed of the chairs of the advisory panels for each of the programs.