{"url_path":"/register/2026-09-18/2026-19173","section_key":"summary","section_title":"Establishment of United States Area Navigation Route T-581 in the Vicinity of Missoula, Montana","topic":"register","document":{"doc_type":"Rule","doc_date":"2026-09-18","source_url":"https://www.federalregister.gov/documents/2026/09/18/2026-19173/establishment-of-united-states-area-navigation-route-t-581-in-the-vicinity-of-missoula-montana","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"Transportation Department"},"word_count":79,"has_tables":false,"body_markdown":null}