Bush unveiled the energy plan on Thursday to criticism from environmental opponents who say it concentrates heavily on increasing supplies of fossil fuels coal, oil, and natural gas and not enough on conservation.

Waxman, the ranking minority member of the committee on Government reform, and Dingell, the ranking member of the Committee on Energy and Commerce, also requested the identities of the energy task force plan participators from the Department of Energy's Andrew Lundquist, the task plan's staff director.

That letter said the task force's decision to meet behind closed doors and exclude "certain parties from participation in its discussions may violate the Federal Advisory Committee Act (FAA)," which bars debating public policy in private.

GAO is requesting data and information from Vice President Dick Cheney's task force which formed the energy plan, said Bob Robinson GAO's managing director of Natural Resources and Environment. Robinson said GAO would write a report and deliver it to the congressmen

Counsel to Vice President Cheney, David Addington, replied in early May to Dingell and Waxman that FAA is not applicable to the task force because it "does not apply to a group 'composed wholly of full-time, or permanent part-time, officers or employees of the Federal Government.'"

Environmental groups have also been attempting to find out the identities of the shapers of the plan.

The Natural Resource Defense Council filed a Freedom of Information Act request in late April. On Monday, the DOE sent some documents to the NRDC, but so far it has not revealed the identities of task plan participants.