This final rule amends the regulation for Superfund Cooperative Agreements and Superfund State Contracts. The revisions to the regulation: Incorporate EPA policy changes since 1990 that impact this regulation; reduce the burden placed by this regulation on Cooperative Agreement recipients and parties to Superfund State Contracts; increase reliance on the Federal Government's uniform administrative requirements for grants and Cooperative Agreements to State and local governments, wherever possible; authorize procedures that required deviations, on multiple occasions, under the existing regulation; expressly authorize previous program initiatives that were proven successful on a pilot basis; provide additional regulatory flexibility without negatively impacting cost recovery actions; update cross-references to other regulations that have changed or been removed; and eliminate references to obsolete forms. The revisions affect States, Indian Tribes, intertribal consortia, and political subdivisions. The revisions will improve the administration and effectiveness of Superfund Cooperative Agreements and Superfund State Contracts.