{"abstract":"In this document, EPA is proposing two discrete frameworks to implement the 8-hour ozone national ambient air quality standard (NAAQS or standard). We are proposing this rule so that States may know which statutory requirements apply for purposes of developing State implementation plans (SIPs) under the Clean Air Act (CAA) to implement the 8-hour ozone NAAQS. The intended effect of the rule is to provide certainty to States regarding their planning obligations such that States may begin SIP development upon designation and classification for the 8-hour standard. Following are the principles that guided us in the development of these frameworks to implement the 8-hour ozone standard: To protect public health, provide incentives for expeditious attainment of the 8-hour ozone standard and avoid incentives for delay; to provide reasonable but expeditious attainment deadlines; to have a basic, straightforward structure that can be communicated easily; to provide flexibility to States and EPA on implementation approaches and control measures while ensuring that the implementation strategy is supported by the CAA; to emphasize national and regional measures to help areas come into attainment and, where possible, reduce the need for those local controls that are more expensive than national and regional measures; and to provide a smooth transition from implementation of the 1-hour ozone NAAQS to implementation of the 8- hour ozone NAAQS. In addition, we intend to clarify the role of Tribes in implementing the 8-hour ozone NAAQS. The two frameworks we are proposing are based on two different classification options, which affect the requirements that would apply to individual nonattainment areas. We prefer classification option 2 because it provides more flexibility to States and Tribes as they address their unique air quality problems. This is likely to allow some areas to attain the standard at a lower cost. However, we are also soliciting comments on option 1, in part because it is less complex and may be easier to communicate, as well as on other ways to classify nonattainment areas.[FEDREG][VOL]*[/VOL][NO]*[/NO][DATE]*[/ DATE][PRORULES][PRORULE][PREAMB][AGENCY]*[/AGENCY][SUBJECT]*[/SUBJECT] This proposed rulemaking does not propose to establish attainment/ nonattainment designations nor does it address the principles that will be considered in the designation process; we have already issued guidance on the principles that States should consider in making designation recommendations, and we will issue further guidance separate from this rulemaking if appropriate. Finally, we are not taking comment at this time on appropriate tests under the 8-hour standard for demonstrating conformity of Federal actions to SIPs. We intend to conduct a separate rulemaking on this issue prior to designating areas under the 8-hour ozone standard. In this proposal, we do not yet propose regulatory text, primarily because a number of options are being proposed for many of the implementation elements, and we believe it would be better to obtain public comment on the options conceptually first. After we receive and consider comment on the proposed options, but before publishing a final rule, we will issue proposed regulatory text.","action":"Proposed rulemaking.","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/2003/06/02/03-13240.html","cfr_references":[{"chapter":null,"citation_url":null,"part":51,"title":40}],"citation":"68 FR 32802","comment_url":null,"comments_close_on":"2003-08-01","correction_of":null,"corrections":[],"dates":"Comments must be received on or before August 1, 2003. We have scheduled public hearings on this proposal for June 17, 2003, June 19, 2003, and June 27, 2003.","disposition_notes":null,"docket_ids":["FRL-7504-2"],"dockets":[],"document_number":"03-13240","effective_on":null,"end_page":32870,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2003/06/02/03-13240.xml","html_url":"https://www.federalregister.gov/documents/2003/06/02/03-13240/proposed-rule-to-implement-the-8-hour-ozone-national-ambient-air-quality-standard","images":{"EP02JN03.000":{"large":"https://img.federalregister.gov/EP02JN03.000/EP02JN03.000_large.png","medium":"https://img.federalregister.gov/EP02JN03.000/EP02JN03.000_medium.png","original_size":"https://img.federalregister.gov/EP02JN03.000/EP02JN03.000_original_size.png"}},"images_metadata":{"EP02JN03.000":{"large":{"identifier":"EP02JN03.000","content_type":"image/png","size":50504,"width":823,"sha":"4650ed6d993bb1d996296845ec31bec0","url":"https://img.federalregister.gov/EP02JN03.000/EP02JN03.000_large.png","height":1141},"medium":{"identifier":"EP02JN03.000","content_type":"image/png","size":23925,"width":455,"sha":"ee5d3eca514d4e8ebcd3ed1455e8bd88","url":"https://img.federalregister.gov/EP02JN03.000/EP02JN03.000_medium.png","height":631},"original_size":{"identifier":"EP02JN03.000","content_type":"image/png","size":26622,"width":1716,"sha":"a9236e1244c4e1546bcfca1108c74f94","url":"https://img.federalregister.gov/EP02JN03.000/EP02JN03.000_original_size.png","height":2380}}},"json_url":"https://www.federalregister.gov/api/v1/documents/03-13240?publication_date=2003-06-02","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2003-06-02/03-13240/mods.xml","not_received_for_publication":null,"page_length":69,"page_views":{"count":489,"last_updated":"2026-10-22 18:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2003-06-02/pdf/03-13240.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2003-06-02","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2003/06/02/03-13240.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":32802,"subtype":null,"title":"Proposed Rule To Implement the 8-Hour Ozone National Ambient Air Quality Standard","toc_doc":"8-hour ozone national ambient air quality standard; implementation","toc_subject":"Air quality implementation plans:","topics":["Air pollution control","Environmental protection","Intergovernmental relations","Ozone","Particulate matter","Transportation","Volatile organic compounds"],"type":"Proposed Rule","volume":68}