"On July 31, 2003, the Senate, facing obstacles to passage of its comprehensive energy bill (S. 14), substituted the energy legislation the Senate had passed and sent to conference in the 107th Congress. Principals are sorting out the implications of this unanticipated development; there are identical or similar provisions in both S. 14 and the substitute measure that the Senate passed as H.R. 6, but there are also significant differences. Amendments passed on the floor to S. 14 do not figure into the legislation passed by the Senate, including the electricity amendment -- crafted over a number of months -- which was on the floor when the Senate made its startling decision. However, the Republican managers of the energy legislation noted that the bill will be rewritten in conference. Among the issues waiting to be addressed in the Senate at the time of passage of H.R. 6 were climate change, clean air, Indian energy development, and hydroelectric relicensing, among other issues. There are climate change provisions in the version of H.R. 6 adopted by the Senate. On April 11, 2003, the House passed its version of H.R. 6 (247-175). The bill includes several provisions that were part of comprehensive, but not enacted, energy legislation (H.R. 4) debated during the 107th Congress. These provisions touch upon energy efficiency and conservation, clean coal technology, and reauthorization of the Price-Anderson Act nuclear liability system. The bill passed by the House would also provide roughly $18 billion in energy tax incentives."
CRS Report for Congress, RL31849