1. 2020 South Carolina Code of Laws :: Title 56 - Motor Vehicles :: Chapter 5 - Uniform Act Regulating Traffic On Highways :: Section 56-5-3670. Goggles or face shields shall be worn by operators under age twenty-one; list of approved goggles and face shields. Justia Law. Accessed June 11, 2022. https://law.justia.com/codes/south-carolina/2020/title-56/chapter-5/section-56-5-3670/.
2. 2021 Indiana Code :: Title 9. Motor Vehicles :: Article 21. Traffic Regulation :: Chapter 10. Motorcycles :: 9-21-10-13. Violations; Class C Infraction. Justia Law. Accessed June 11, 2022. https://law.justia.com/codes/indiana/2021/title-9/article-21/chapter-10/section-9-21-10-13/.
3. 23 V.S.A. § 1257. Accessed June 11, 2022. https://legislature.vermont.gov/statutes/section/23/013/01257.
4. 49 CFR 571.218 -- Standard No. 218; Motorcycle helmets. Code of Federal Regulations. Accessed June 11, 2022. https://www.ecfr.gov/current/title-49/subtitle-B/chapter-V/part-571/subpart-B/section-571.218.
5. A Moment in Time: Highway Safety Breakthrough - General Highway History - Highway History - Federal Highway Administration. Accessed June 12, 2022. https://www.fhwa.dot.gov/highwayhistory/moment/highway_safety_breakthrough.cfm.