{"abstract":"EPA is announcing it is approving a revision to the Missouri State Implementation Plan (SIP) which pertains to the rescission of two outdated opacity rules for the Kansas City and St. Louis areas and the revision of the state-wide opacity rule. Approval of this revision will simplify the SIP, ensure consistency between the state and federally- approved rules, and ensure Federal enforceability of the revised state rule.","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/2003/03/18/03-6309.html","cfr_references":[{"chapter":null,"citation_url":null,"part":52,"title":40}],"citation":"68 FR 12827","comment_url":null,"comments_close_on":"2003-04-17","correction_of":null,"corrections":[],"dates":"This direct final rule will be effective May 19, 2003, unless EPA receives adverse comments by April 17, 2003. If adverse comments are received, EPA will publish a timely withdrawal of the direct final rule in the Federal Register informing the public that the rule will not take effect.","disposition_notes":null,"docket_ids":["MO 171-1171a","FRL-7468-1"],"dockets":[],"document_number":"03-6309","effective_on":"2003-05-19","end_page":12829,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2003/03/18/03-6309.xml","html_url":"https://www.federalregister.gov/documents/2003/03/18/03-6309/approval-and-promulgation-of-implementation-plans-state-of-missouri","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/03-6309?publication_date=2003-03-18","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2003-03-18/03-6309/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":14,"last_updated":"2026-04-04 20:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2003-03-18/pdf/03-6309.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2003-03-18","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2003/03/18/03-6309.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":12827,"subtype":null,"title":"Approval and Promulgation of Implementation Plans; State of Missouri","toc_doc":"Missouri","toc_subject":"Air quality implementation plans; approval and promulgation; various States:","topics":["Air pollution control","Environmental protection","Incorporation by reference","Intergovernmental relations","Ozone","Particulate matter","Reporting and recordkeeping requirements","Volatile organic compounds"],"type":"Rule","volume":68}