{"abstract":"The U.S. Department of Energy (DOE) is amending its regulations in compliance with a United States Court of Appeals for the Eighth Circuit court decision vacating the March 29, 2024 rule revising procedures for calculating a value for the petroleum-equivalent fuel economy of electric vehicles (EVs) used by the Environmental Protection Agency (EPA) in calculating light-duty vehicle manufacturers' compliance with the Department of Transportation's (DOT) Corporate Average Fuel Economy (CAFE) standards.","action":"Final rule, technical amendment.","agencies":[{"raw_name":"DEPARTMENT OF ENERGY","name":"Energy Department","id":136,"url":"https://www.federalregister.gov/agencies/energy-department","json_url":"https://www.federalregister.gov/api/v1/agencies/136","parent_id":null,"slug":"energy-department"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2026/01/08/2026-00154.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"474","title":10}],"citation":"91 FR 553","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This action is effective on January 8, 2026. However, the opinion had legal effect on September 5, 2025.","disposition_notes":null,"docket_ids":["EERE-2025-VT-0073"],"dockets":[{"supporting_documents":[],"agency_name":"EERE","documents":[{"comment_count":0,"comment_start_date":null,"updated_at":"2026-01-09T07:56:09.704-05:00","comment_url":"https://www.regulations.gov/commenton/EERE-2025-VT-0073-0001","allow_late_comments":false,"id":"EERE-2025-VT-0073-0001","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":0,"id":"EERE-2025-VT-0073","title":"Petroleum-Equivalent Fuel Economy Calculation"}],"document_number":"2026-00154","effective_on":"2026-01-08","end_page":555,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/01/08/2026-00154.xml","html_url":"https://www.federalregister.gov/documents/2026/01/08/2026-00154/petroleum-equivalent-fuel-economy-calculation","images":{"ER08JA26.038":{"large":"https://img.federalregister.gov/ER08JA26.038/ER08JA26.038_large.png","medium":"https://img.federalregister.gov/ER08JA26.038/ER08JA26.038_medium.png","original_size":"https://img.federalregister.gov/ER08JA26.038/ER08JA26.038_original_size.png"},"ER08JA26.037":{"large":"https://img.federalregister.gov/ER08JA26.037/ER08JA26.037_large.png","medium":"https://img.federalregister.gov/ER08JA26.037/ER08JA26.037_medium.png","original_size":"https://img.federalregister.gov/ER08JA26.037/ER08JA26.037_original_size.png"}},"images_metadata":{"ER08JA26.038":{"large":{"identifier":"ER08JA26.038","content_type":"image/png","size":3977,"width":338,"sha":"d80dccd5f866d5be66b6dc08d7dc79f7","url":"https://img.federalregister.gov/ER08JA26.038/ER08JA26.038_large.png","height":116},"medium":{"identifier":"ER08JA26.038","content_type":"image/png","size":1473,"width":159,"sha":"bbb1869f6af6aa932c8bb6f258cc4b11","url":"https://img.federalregister.gov/ER08JA26.038/ER08JA26.038_medium.png","height":55},"original_size":{"identifier":"ER08JA26.038","content_type":"image/png","size":4982,"width":1202,"sha":"91d73467d041d5f6463160ddadd159d9","url":"https://img.federalregister.gov/ER08JA26.038/ER08JA26.038_original_size.png","height":414}},"ER08JA26.037":{"large":{"identifier":"ER08JA26.037","content_type":"image/png","size":3789,"width":338,"sha":"06851ff3807011745ac59ae93b497824","url":"https://img.federalregister.gov/ER08JA26.037/ER08JA26.037_large.png","height":116},"medium":{"identifier":"ER08JA26.037","content_type":"image/png","size":1498,"width":159,"sha":"21efed0a663266f3a97664d181a560ca","url":"https://img.federalregister.gov/ER08JA26.037/ER08JA26.037_medium.png","height":55},"original_size":{"identifier":"ER08JA26.037","content_type":"image/png","size":5178,"width":1202,"sha":"9aec58c97e87e9143828b138b6fc5544","url":"https://img.federalregister.gov/ER08JA26.037/ER08JA26.037_original_size.png","height":414}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-00154?publication_date=2026-01-08","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-01-08/2026-00154/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":765,"last_updated":"2026-06-24 14:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-01-08/pdf/2026-00154.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-00154.pdf?1767793513","publication_date":"2026-01-08","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/01/08/2026-00154.txt","regulation_id_number_info":{"1904-AG09":{"issue":"202504","html_url":"https://www.federalregister.gov/regulations/1904-AG09/petroleum-equivalent-fuel-economy-calculation","title":"Petroleum-Equivalent Fuel Economy Calculation","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202504&RIN=1904-AG09&operation=OPERATION_EXPORT_XML","priority_category":"Other Significant"}},"regulation_id_numbers":["1904-AG09"],"regulations_dot_gov_info":{"supporting_documents":[],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/1904-AG09/petroleum-equivalent-fuel-economy-calculation","title":"Petroleum-Equivalent Fuel Economy Calculation"},"comments_count":0,"agency_id":"EERE","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EERE-2025-VT-0073","supporting_documents_count":0,"docket_id":"EERE-2025-VT-0073","document_id":"EERE-2025-VT-0073-0001","regulation_id_number":"1904-AG09","title":"Petroleum-Equivalent Fuel Economy Calculation","checked_regulationsdotgov_at":"2026-01-10T16:55:04Z"},"regulations_dot_gov_url":null,"significant":true,"signing_date":null,"start_page":553,"subtype":null,"title":"Petroleum-Equivalent Fuel Economy Calculation","toc_doc":"Petroleum-Equivalent Fuel Economy Calculation","toc_subject":null,"topics":["Electric power","Energy conservation","Fuel economy","Motor vehicles","Research"],"type":"Rule","volume":91}