{"abstract":"The U.S. Department of Transportation (Department or DOT) is extending the comment end date for interested persons to submit comments to its proposed rule on Enhancing Flexibility of Air Fare Price Advertising from July 31, 2026, to August 21, 2026.","action":"Proposed rule; extension of comment period.","agencies":[{"raw_name":"DEPARTMENT OF TRANSPORTATION","name":"Transportation Department","id":492,"url":"https://www.federalregister.gov/agencies/transportation-department","json_url":"https://www.federalregister.gov/api/v1/agencies/492","parent_id":null,"slug":"transportation-department"},{"raw_name":"Office of the Secretary"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2026/07/31/2026-15529.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"399","title":14}],"citation":"91 FR 48319","comment_url":null,"comments_close_on":"2026-08-21","correction_of":null,"corrections":[],"dates":"The comment period for the proposed rule, which was published in the Federal Register on July 1, 2026, at 91 FR 39932, is extended to August 21, 2026.","disposition_notes":null,"docket_ids":["Docket No. DOT-OST-2025-0831"],"dockets":[{"supporting_documents":[{"title":"Enhancing Flexibility of Air Fare Price Advertising - Regulatory Impact Analysis - RIN 2105-AF37 (February 2026)","document_id":"DOT-OST-2025-0831-0046"}],"agency_name":"DOT","documents":[{"comment_count":0,"comment_start_date":"2026-07-31","updated_at":"2026-07-31T10:56:50.921-04:00","comment_url":"https://www.regulations.gov/commenton/DOT-OST-2025-0831-0106","allow_late_comments":false,"id":"DOT-OST-2025-0831-0106","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":1,"id":"DOT-OST-2025-0831","title":"Full Fare Rule Revision"}],"document_number":"2026-15529","effective_on":null,"end_page":48320,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/07/31/2026-15529.xml","html_url":"https://www.federalregister.gov/documents/2026/07/31/2026-15529/enhancing-flexibility-of-air-fare-price-advertising","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-15529?publication_date=2026-07-31","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-07-31/2026-15529/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":2695,"last_updated":"2026-08-07 10:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-07-31/pdf/2026-15529.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-15529.pdf?1785415518","publication_date":"2026-07-31","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/07/31/2026-15529.txt","regulation_id_number_info":{"2105-AF37":{"issue":"202504","html_url":"https://www.federalregister.gov/regulations/2105-AF37/enhancing-flexibility-of-air-fare-price-advertising-","title":"Enhancing Flexibility of Air Fare Price Advertising   ","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202504&RIN=2105-AF37&operation=OPERATION_EXPORT_XML","priority_category":"Other Significant"}},"regulation_id_numbers":["2105-AF37"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Enhancing Flexibility of Air Fare Price Advertising - Regulatory Impact Analysis - RIN 2105-AF37 (February 2026)","document_id":"DOT-OST-2025-0831-0046"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2105-AF37/enhancing-flexibility-of-air-fare-price-advertising-","title":"Enhancing Flexibility of Air Fare Price Advertising   "},"comments_count":0,"agency_id":"DOT","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=DOT-OST-2025-0831","supporting_documents_count":1,"docket_id":"DOT-OST-2025-0831","document_id":"DOT-OST-2025-0831-0106","regulation_id_number":"2105-AF37","title":"Full Fare Rule Revision","checked_regulationsdotgov_at":"2026-08-01T17:55:03Z"},"regulations_dot_gov_url":null,"significant":true,"signing_date":null,"start_page":48319,"subtype":null,"title":"Enhancing Flexibility of Air Fare Price Advertising","toc_doc":"Enhancing Flexibility of Air Fare Price Advertising","toc_subject":null,"topics":[],"type":"Proposed Rule","volume":91}