{"data":{"id":"us/49-cfr-199.103","jurisdiction":"us","citation":"49 CFR 199.103","heading":"Use of persons who fail or refuse a drug test.","body":"(a) An operator may not knowingly use as an employee any person who—\n(1) Fails a drug test required by this part and the medical review officer makes a determination under DOT Procedures; or\n(2) Refuses to take a drug test required by this part.\n(b) Paragraph (a)(1) of this section does not apply to a person who has—\n(1) Passed a drug test under DOT Procedures;\n(2) Been considered by the medical review officer in accordance with DOT Procedures and been determined by a substance abuse professional to have successfully completed required education or treatment; and\n(3) Not failed a drug test required by this part after returning to duty.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER D—PIPELINE SAFETY","PART 199—DRUG AND ALCOHOL TESTING","Subpart B—Drug Testing"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"eac4b05bc7bcf148c35c53245656f2fbb5cfac2d98d7136231d2c2b8b776fe7d","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-199.101","next":"us/49-cfr-199.105"},"notice":"GroundRules: Original legal text. Not legal advice."}