{"abstract":"MSHA is eliminating outdated requirements for diesel particulate matter (DPM) personal exposure limits for underground metal and nonmetal (MNM) mines. These requirements are being removed from MSHA's regulations because they contain outdated effective dates and exposure limits that are no longer applicable.","action":"Final rule.","agencies":[{"raw_name":"DEPARTMENT OF LABOR","name":"Labor Department","id":271,"url":"https://www.federalregister.gov/agencies/labor-department","json_url":"https://www.federalregister.gov/api/v1/agencies/271","parent_id":null,"slug":"labor-department"},{"raw_name":"Mine Safety and Health Administration","name":"Mine Safety and Health Administration","id":288,"url":"https://www.federalregister.gov/agencies/mine-safety-and-health-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/288","parent_id":271,"slug":"mine-safety-and-health-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2026/11/12/2026-23050.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"57","title":30}],"citation":"91 FR 72781","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"Effective date: December 14, 2026.","disposition_notes":null,"docket_ids":["Docket No. MSHA-2025-0079"],"dockets":[{"supporting_documents":[],"agency_name":"MSHA","documents":[{"comment_count":0,"comment_start_date":"2026-11-12","updated_at":"2026-11-12T09:57:37.000-05:00","comment_url":"https://www.regulations.gov/commenton/MSHA-2025-0079-0005","allow_late_comments":false,"id":"MSHA-2025-0079-0005","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":0,"id":"MSHA-2025-0079","title":"Improving and Eliminating Regulations; Limit on Exposure to Diesel Particulate Matter in Underground Metal and Nonmetal Mines"}],"document_number":"2026-23050","effective_on":"2026-12-14","end_page":72784,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/11/12/2026-23050.xml","html_url":"https://www.federalregister.gov/documents/2026/11/12/2026-23050/improving-and-eliminating-regulations-limit-on-exposure-to-diesel-particulate-matter-in-underground","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-23050?publication_date=2026-11-12","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-11-12/2026-23050/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":184,"last_updated":"2026-11-14 18:15:03 -0500"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-11-12/pdf/2026-23050.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-23050.pdf?1794318326","publication_date":"2026-11-12","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/11/12/2026-23050.txt","regulation_id_number_info":{"1219-AC10":{"issue":"202504","html_url":"https://www.federalregister.gov/regulations/1219-AC10/improving-and-eliminating-regulations-limit-of-exposure-to-diesel-particulate-matter-in-underground-","title":"Improving and Eliminating Regulations; Limit of Exposure to Diesel Particulate Matter in Underground Metal and Nonmental Mines","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202504&RIN=1219-AC10&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["1219-AC10"],"regulations_dot_gov_info":{"supporting_documents":[],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/1219-AC10/improving-and-eliminating-regulations-limit-of-exposure-to-diesel-particulate-matter-in-underground-","title":"Improving and Eliminating Regulations; Limit of Exposure to Diesel Particulate Matter in Underground Metal and Nonmental Mines"},"comments_count":0,"agency_id":"MSHA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=MSHA-2025-0079","supporting_documents_count":0,"docket_id":"MSHA-2025-0079","document_id":"MSHA-2025-0079-0005","regulation_id_number":"1219-AC10","title":"Improving and Eliminating Regulations; Limit on Exposure to Diesel Particulate Matter in Underground Metal and Nonmetal Mines","checked_regulationsdotgov_at":"2026-11-13T18:55:04Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":72781,"subtype":null,"title":"Improving and Eliminating Regulations; Limit on Exposure to Diesel Particulate Matter in Underground Metal and Nonmetal Mines","toc_doc":"Limit on Exposure to Diesel Particulate Matter in Underground Metal and Nonmetal Mines","toc_subject":"Improving and Eliminating Regulations","topics":["Chemicals","Electric power","Explosives","Fire prevention","Gases","Hazardous substances","Metals","Mine safety and health","Mines","Noise control","Radiation protection","Reporting and recordkeeping requirements","Surface mining","Underground mining"],"type":"Rule","volume":91}