{"data":{"id":"us/45-cfr-641.19","jurisdiction":"us","citation":"45 CFR 641.19","heading":"Modification of environmental documents.","body":"The responsible official should revise or supplement an environmental document if there is a change in a proposed action that may have more than a minor or transitory effect on the antarctic environment, or if there are new circumstances or information that indicate the action may have impacts not anticipated in the original environmental document.","path":["Title 45—Public Welfare","Subtitle B—Regulations Relating to Public Welfare","CHAPTER VI—NATIONAL SCIENCE FOUNDATION","PART 641—ENVIRONMENTAL ASSESSMENT PROCEDURES FOR PROPOSED NATIONAL SCIENCE FOUNDATION ACTIONS IN ANTARCTICA"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-45.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:21Z","sha256":"57b0ff58f736abba8ff0bde72730fd2c9a64dcafdb63e45b31ce49d567942090","source_id":"us-cfr","stale":true,"prev":"us/45-cfr-641.18","next":"us/45-cfr-641.20"},"notice":"GroundRules: Original legal text. Not legal advice."}