{"data":{"id":"us/49-cfr-564.3","jurisdiction":"us","citation":"49 CFR 564.3","heading":"Applicability.","body":"This part applies to replaceable light sources used as original equipment, and standardized sealed beam headlamp units used as original equipment and replacement equipment in motor vehicle headlighting systems.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER V—NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 564—REPLACEABLE LIGHT SOURCE AND SEALED BEAM HEADLAMP INFORMATION"],"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":"35a2646d45074cb2bb20d6835140b9cd087842d66afb383459c54525d80bb7aa","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-564.2","next":"us/49-cfr-564.4"},"notice":"GroundRules: Original legal text. Not legal advice."}