This bill mandates that several key federal agencies impose automatic expiration dates, or sunset dates, on their regulations. The agencies covered include the Department of Energy , specific offices within the Department of the Interior such as the Bureau of Land Management and the Bureau of Ocean Energy Management, and the Federal Energy Regulatory Commission . These requirements apply to regulations promulgated under various energy, mining, and land management statutes. For regulations already in effect, agencies must amend them within 90 days of the bill's enactment to include an expiration date one year from the amendment's effective date. New regulations promulgated after the bill's enactment will automatically expire five years after their effective date. However, an agency head can waive this five-year sunset for new regulations if they determine the regulation has a net deregulatory effect and notify the Office of Management and Budget. Agencies have the authority to extend these sunset dates for periods of up to five years at a time. To do so, the agency must provide an opportunity for public comment on the regulation's costs and benefits. Following this public input, the agency head must determine that an extension is warranted based on the comments received. An exception exists for amendments that have a net deregulatory effect, which can extend the sunset without the public comment process. If a regulation's expiration date is not extended, it will automatically cease to have any legal effect. The responsible agency will then be prohibited from enforcing that regulation and must promptly remove it from the Code of Federal Regulations. This mechanism aims to ensure regular review and potential elimination of regulations.