{"abstract":"We, the National Marine Fisheries Service (NMFS), issue final regulations to amend the Code of Federal Regulations (CFR) to implement the Endangered Species Act (ESA) regarding experimental populations. This rule amends the CFR to establish definitions and procedures for: Establishing and/or designating certain populations of species otherwise listed as endangered or threatened as experimental populations; determining whether experimental populations are \"essential\" or \"nonessential;\" and promulgating appropriate protective measures for experimental populations.","action":"Final rule.","agencies":[{"raw_name":"DEPARTMENT OF COMMERCE","name":"Commerce Department","id":54,"url":"https://www.federalregister.gov/agencies/commerce-department","json_url":"https://www.federalregister.gov/api/v1/agencies/54","parent_id":null,"slug":"commerce-department"},{"raw_name":"National Oceanic and Atmospheric Administration","name":"National Oceanic and Atmospheric Administration","id":361,"url":"https://www.federalregister.gov/agencies/national-oceanic-and-atmospheric-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/361","parent_id":54,"slug":"national-oceanic-and-atmospheric-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2016/05/26/2016-12379.html","cfr_references":[{"chapter":null,"citation_url":null,"part":222,"title":50}],"citation":"81 FR 33416","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"The final rule is effective June 27, 2016.","disposition_notes":null,"docket_ids":["Docket No. 140725620-6418-02"],"dockets":[],"document_number":"2016-12379","effective_on":"2016-06-27","end_page":33423,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2016/05/26/2016-12379.xml","html_url":"https://www.federalregister.gov/documents/2016/05/26/2016-12379/endangered-and-threatened-species-designation-of-experimental-populations-under-the-endangered","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2016-12379?publication_date=2016-05-26","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2016-05-26/2016-12379/mods.xml","not_received_for_publication":null,"page_length":8,"page_views":{"count":2152,"last_updated":"2026-10-24 04:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2016-05-26/pdf/2016-12379.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2016-12379.pdf?1464180345","publication_date":"2016-05-26","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2016/05/26/2016-12379.txt","regulation_id_number_info":{"0648-BE43":{"issue":"201604","html_url":"https://www.federalregister.gov/regulations/0648-BE43/endangered-and-threatened-species-regulations-for-the-designation-of-experimental-populations-under-","title":"Endangered and Threatened Species: Regulations for the Designation of Experimental Populations Under the Endangered Species Act","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=201604&RIN=0648-BE43&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["0648-BE43"],"regulations_dot_gov_info":{"supporting_documents":[],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/0648-BE43/endangered-and-threatened-species-regulations-for-the-designation-of-experimental-populations-under-","title":"Endangered and Threatened Species: Regulations for the Designation of Experimental Populations Under the Endangered Species Act"},"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=NOAA-NMFS-2014-0104","supporting_documents_count":null,"docket_id":"NOAA-NMFS-2014-0104","regulation_id_number":"0648-BE43","title":"Endangered and Threatened Species: Regulations for the Designation of Experimental Populations under the Endangered Species Act","checked_regulationsdotgov_at":"2016-06-15T06:00:13Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":33416,"subtype":null,"title":"Endangered and Threatened Species: Designation of Experimental Populations Under the Endangered Species Act","toc_doc":"Designation of Experimental Populations under the Endangered Species Act","toc_subject":"Endangered and Threatened Species:","topics":["Endangered and threatened species"],"type":"Rule","volume":81}