{"abstract":"This document provides clarity and guidance regarding the use of the contraction \"EST\", which stands for \"Estimated\", when appended to the end of validity time in a NOTAM. The FAA is taking this action to align NOTAM policy with International Civil Aviation Organization (ICAO) standards and recommended practices.","action":"Policy change.","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":"Federal Aviation Administration","name":"Federal Aviation Administration","id":159,"url":"https://www.federalregister.gov/agencies/federal-aviation-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/159","parent_id":492,"slug":"federal-aviation-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2015/10/05/2015-25192.html","cfr_references":[{"chapter":0,"citation_url":null,"part":null,"title":14}],"citation":"80 FR 60033","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"Effective date: December 15, 2015.","disposition_notes":null,"docket_ids":[],"dockets":[],"document_number":"2015-25192","effective_on":"2015-12-15","end_page":60033,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2015/10/05/2015-25192.xml","html_url":"https://www.federalregister.gov/documents/2015/10/05/2015-25192/change-in-est-usage-in-notice-to-airmen-notam","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2015-25192?publication_date=2015-10-05","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2015-10-05/2015-25192/mods.xml","not_received_for_publication":null,"page_length":1,"page_views":{"count":625,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2015-10-05/pdf/2015-25192.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2015-25192.pdf?1443789969","publication_date":"2015-10-05","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2015/10/05/2015-25192.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"New York North Shore - Materials from Public Meetings","document_id":"FAA-2013-0259-2759"},{"title":"Notice of Meeting Graphic June 2016","document_id":"FAA-2013-0259-1171"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2013-0259","supporting_documents_count":2,"docket_id":"FAA-2013-0259","regulation_id_number":null,"title":"Federal Registers for Applications, Notices, and Orders - Miscellaneous","checked_regulationsdotgov_at":"2015-10-25T06:00:15Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":60033,"subtype":null,"title":"Change in EST Usage in Notice to Airmen (NOTAM)","toc_doc":"Change in EST Usage in Notice to Airmen","toc_subject":null,"topics":[],"type":"Rule","volume":80}