{"data":{"id":"us/10-cfr-39.49","jurisdiction":"us","citation":"10 CFR 39.49","heading":"Uranium sinker bars.","body":"The licensee may use a uranium sinker bar in well logging applications only if it is legibly impressed with the words “CAUTION—RADIOACTIVE-DEPLETED URANIUM” and “NOTIFY CIVIL AUTHORITIES (or COMPANY NAME) IF FOUND.”","path":["Title 10—Energy","CHAPTER I—NUCLEAR REGULATORY COMMISSION","PART 39—LICENSES AND RADIATION SAFETY REQUIREMENTS FOR WELL LOGGING","Subpart C—Equipment"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-10.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:09Z","sha256":"ded7a78c57995ede76118d49d46e1f81b6717a213783a426f265cbf819b30eb5","source_id":"us-cfr","stale":true,"prev":"us/10-cfr-39.47","next":"us/10-cfr-39.51"},"notice":"GroundRules: Original legal text. Not legal advice."}