The document outlines the Department of the Interior's preliminary plan for retrospectively reviewing existing regulations to make them more efficient, less burdensome, and functional. It discusses several regulations and efforts that are already under review, such as offshore energy development rules. It then provides an initial list of regulations it proposes to review over the next two years, including oil and gas royalty valuation rules to simplify calculations and the Endangered Species Act rules to improve effectiveness and reduce burden. The plan seeks public input on the regulatory review process.