A House subcommittee has concluded that the Bush administration has been slow to implement major changes in information sharing and other key provisions of the 2004 law that overhauled the U.S. intelligence community.

The Intelligence panel’s report, which is scheduled to be officially released Thursday, found that the administration has failed to revamp its approach to information analysis, neglecting large swaths of potentially useful data. The report also found that the new Office of the Director of National Intelligence has done a poor job of prioritizing key tasks.

Sources familiar with the contents of the report provided details of its findings late Wednesday, but requested anonymity because it had not yet been publicly released.

The report was produced by the House Intelligence Oversight Subcommittee, a panel that Peter Hoekstra, R-Mich., formed after he became chairman of the overall Intelligence Committee in 2004. As its first job, the subcommittee reviewed how the 2004 intelligence overhaul (PL 108-458) was being implemented.

Every member of the subcommittee signed on to the final report — a rare moment of bipartisan agreement on the once nonpartisan Intelligence panels in the House and Senate.

“It’s been a challenge to keep everybody on board,” said William M. “Mac” Thornberry, the Texas Republican who chairs the subcommittee. “Every different member of the subcommittee has contributed to it.”

Thornberry discussed his panel’s approach to its report but declined to discuss its findings before the report’s release.

The subcommittee chairman said his panel looked at “the major areas of reform” called for by the 2004 law and gave “an assessment at this point at how close we have come to meeting the goals of the act.”

“Most people would not disagree it’s a mixed bag, and that’s what we concluded,” Thornberry said, adding that the report provides guidance as well as criticism.

According to a source who would discuss the subcommittee’s findings, the report faults the administration’s progress in most areas, including its workings with Congress; the establishment of a civil liberties board; and its processing of security clearances to hire new human intelligence officers.

The Office of the Director of National Intelligence gets the blame for many of the delays and is faulted for a scattershot approach to its mission rather than focusing in on top priorities such as information sharing.

The panel concludes that the administration has vastly improved the President’s Daily Brief and the National Intelligence Estimate, two key formats for compiling and reporting intelligence developments.

Among the panel’s recommendations are the elimination of duplicative security clearance procedures; the development of comprehensive plans for information sharing; and the installation of stable leadership at the FBI’s National Security Branch to speed its transformation into an intelligence agency. A revolving door at the branch has inhibited the FBI’s transformation, the report concludes.

The report mostly focuses on the administration, but it also finds fault with the Senate confirmation process for delaying appointments to the civil liberties board.

Another source said John D. Negroponte, the director of national intelligence, took issue with some aspects of the report, especially the conclusion that the administration has shown a lack of urgency.

Hoekstra clashed with Negroponte after the congressman’s predecessor at the helm of the House Intelligence Committee, Florida Republican Porter Goss (1989-2004), was forced out as head of the Central Intelligence Agency in a move widely viewed as orchestrated by Negroponte.