{"abstract":"EPA is taking direct final action on revisions to its heavy- duty diesel regulations that will enable emergency vehicles, such as dedicated ambulances and fire trucks, to perform mission-critical life- saving work without risking that abnormal conditions of the emission control system could lead to decreased engine power, speed or torque. The revisions will allow manufacturers to request and EPA to approve modifications to emission control systems on emergency vehicles so they do not interfere with the vehicles' missions. This action is not expected to result in any significant changes in regulatory burdens or costs.","action":"Direct final rule.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2012/06/08/2012-13088.html","cfr_references":[{"chapter":null,"citation_url":null,"part":85,"title":40},{"chapter":null,"citation_url":null,"part":86,"title":40},{"chapter":null,"citation_url":null,"part":1039,"title":40}],"citation":"77 FR 34130","comment_url":null,"comments_close_on":"2012-07-27","correction_of":null,"corrections":[],"dates":"This rule is effective on August 7, 2012 without further notice, unless EPA receives adverse comment. If we receive relevant adverse comment on distinct elements of this rule by July 27, 2012, we will publish a timely withdrawal in the Federal Register indicating which provisions we are withdrawing. The provisions that are not withdrawn will become effective on August 7, 2012, notwithstanding adverse comment on any other provision.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2011-1032","FRL-9673-1"],"dockets":[],"document_number":"2012-13088","effective_on":"2012-08-07","end_page":34148,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2012/06/08/2012-13088.xml","html_url":"https://www.federalregister.gov/documents/2012/06/08/2012-13088/heavy-duty-highway-program-revisions-for-emergency-vehicles","images":{"ER08JN12.000":{"large":"https://img.federalregister.gov/ER08JN12.000/ER08JN12.000_large.png","medium":"https://img.federalregister.gov/ER08JN12.000/ER08JN12.000_medium.png","original_size":"https://img.federalregister.gov/ER08JN12.000/ER08JN12.000_original_size.png"}},"images_metadata":{"ER08JN12.000":{"large":{"identifier":"ER08JN12.000","content_type":"image/png","size":51325,"width":822,"sha":"1a7c814b37b85b41a32b75b55ab80439","url":"https://img.federalregister.gov/ER08JN12.000/ER08JN12.000_large.png","height":617},"medium":{"identifier":"ER08JN12.000","content_type":"image/png","size":15299,"width":458,"sha":"a91e8ee2cbb264551afc5b257b78bbbd","url":"https://img.federalregister.gov/ER08JN12.000/ER08JN12.000_medium.png","height":344},"original_size":{"identifier":"ER08JN12.000","content_type":"image/png","size":99617,"width":1734,"sha":"52cd437954a5a0ec2e51cde6e54ef966","url":"https://img.federalregister.gov/ER08JN12.000/ER08JN12.000_original_size.png","height":1301}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2012-13088?publication_date=2012-06-08","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2012-06-08/2012-13088/mods.xml","not_received_for_publication":null,"page_length":19,"page_views":{"count":1166,"last_updated":"2026-09-20 12:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2012-06-08/pdf/2012-13088.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2012-13088.pdf?1339073408","publication_date":"2012-06-08","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2012/06/08/2012-13088.txt","regulation_id_number_info":{"2060-AR54":null},"regulation_id_numbers":["2060-AR54"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Email from VW to USEPA","document_id":"EPA-HQ-OAR-2011-1032-0065"},{"title":"Matt Spears Memorandum re External Meetings 07 30 2014","document_id":"EPA-HQ-OAR-2011-1032-0064"},{"title":"Docket Memo from William Charmley","document_id":"EPA-HQ-OAR-2011-1032-0063"},{"title":"Summary and Analysis of Comments [EPA-420-R-14-001]","document_id":"EPA-HQ-OAR-2011-1032-0062"},{"title":"Integer Monitor Issue 21 April 2013","document_id":"EPA-HQ-OAR-2011-1032-0061"},{"title":"Integer information on DEF","document_id":"EPA-HQ-OAR-2011-1032-0060"},{"title":"Emergency vehicle discussion with GSA","document_id":"EPA-HQ-OAR-2011-1032-0059"},{"title":"Email on Revised Definitions of Emergency Vehicle and Emergency Equipment","document_id":"EPA-HQ-OAR-2011-1032-0058"},{"title":"Email on Cummins-powered airport emergency vehicles","document_id":"EPA-HQ-OAR-2011-1032-0057"},{"title":"Email from Forest Service on Fire Dozers","document_id":"EPA-HQ-OAR-2011-1032-0056"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OAR-2011-1032","supporting_documents_count":44,"docket_id":"EPA-HQ-OAR-2011-1032","regulation_id_number":"2060-AR54","title":"Heavy-Duty Highway Program: Revisions for Emergency Vehicles and SCR Maintenance","checked_regulationsdotgov_at":"2012-06-28T08:06:38Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":34130,"subtype":null,"title":"Heavy-Duty Highway Program: Revisions for Emergency Vehicles","toc_doc":"Revisions for Emergency Vehicles","toc_subject":"Heavy-Duty Highway Program:","topics":["Administrative practice and procedure","Air pollution control","Confidential business information","Environmental protection","Imports","Labeling","Motor vehicle pollution","Penalties","Reporting and recordkeeping requirements","Research","Warranties"],"type":"Rule","volume":77}