{"data":{"id":"us/16-cfr-1203.9","jurisdiction":"us","citation":"16 CFR 1203.9","heading":"Test headforms.","body":"The headforms used for testing shall be selected from sizes A, E, J, M, and O, as defined by DRAFT ISO/DIS 6220-1983, in accordance with § 1203.10. Headforms used for impact testing shall be rigid and be constructed of low-resonance K-1A magnesium alloy.","path":["Title 16—Commercial Practices","CHAPTER II—CONSUMER PRODUCT SAFETY COMMISSION","SUBCHAPTER B—CONSUMER PRODUCT SAFETY ACT REGULATIONS","PART 1203—SAFETY STANDARD FOR BICYCLE HELMETS","Subpart A—The Standard"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-16.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:29Z","sha256":"c83d9a2562290f64c0f78ec90a49d532f4844333375c315105ad31d00bed1e5e","source_id":"us-cfr","stale":true,"prev":"us/16-cfr-1203.8","next":"us/16-cfr-1203.10"},"notice":"GroundRules: Original legal text. Not legal advice."}