{"abstract":"Pursuant to the Clean Air Act (Act), EPA is approving the Illinois and Missouri 1-hour ozone attainment demonstration State Implementation Plans (SIP) for the St. Louis moderate ozone nonattainment area. In conjunction with its approval of the attainment demonstration, EPA is: extending the ozone attainment date for the St. Louis ozone nonattainment area to November 15, 2004, while retaining the area's current classification as a moderate ozone nonattainment area; withdrawing EPA's March 19, 2001, rulemaking determining nonattainment and reclassification of the St. Louis ozone nonattainment area; finding that the St. Louis ozone nonattainment area meets the reasonably available control measures (RACM) requirements of the Act; finding that the contingency measures identified by the states of Illinois and Missouri are adequate; approving the Illinois and Missouri motor vehicle emissions budgets (MVEB); and approving an exemption from the oxides of nitrogen ( NO<INF>X</INF>) emission control requirements for reasonably available control technology (RACT) and disapproving an exemption from the NO<INF>X</INF> new source review (NSR) and NO<INF>X</INF> conformity requirements for the Illinois portion of the St. Louis ozone nonattainment area.","action":"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/2001/06/26/01-15842.html","cfr_references":[{"chapter":null,"citation_url":null,"part":52,"title":40},{"chapter":null,"citation_url":null,"part":81,"title":40}],"citation":"66 FR 33996","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This rule is effective immediately June 26, 2001.","disposition_notes":null,"docket_ids":["Tracking No. MO-0132-1132, IL 196-3","FRL-7001-7"],"dockets":[],"document_number":"01-15842","effective_on":"2001-06-26","end_page":34011,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2001/06/26/01-15842.xml","html_url":"https://www.federalregister.gov/documents/2001/06/26/01-15842/approval-and-promulgation-of-implementation-plans-states-of-illinois-and-missouri-1-hour-ozone","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/01-15842?publication_date=2001-06-26","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2001-06-26/01-15842/mods.xml","not_received_for_publication":null,"page_length":16,"page_views":{"count":53,"last_updated":"2026-10-23 06:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2001-06-26/pdf/01-15842.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2001-06-26","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2001/06/26/01-15842.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":33996,"subtype":null,"title":"Approval and Promulgation of Implementation Plans; States of Illinois and Missouri; 1-Hour Ozone Attainment Demonstrations, Motor Vehicle Emissions Budgets, Reasonably Available Control Measures, Contingency Measures, Attainment Date Extension, and Withdrawal of Nonattainment Determination and Reclassification","toc_doc":"Illinois and Missouri","toc_subject":"Air quality implementation plans; approval and promulgation; various States; air quality planning purposes; designation of areas:","topics":["Air pollution control","Carbon monoxide","Environmental protection","Hydrocarbons","Incorporation by reference","Intergovernmental relations","Lead","Nitrogen dioxide","Ozone","Particulate matter","Reporting and recordkeeping requirements","Sulfur oxides","Wilderness areas"],"type":"Rule","volume":66}