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¹Alaska's motorcycle helmet use law covers passengers of all ages, operators younger than 18, and operators with instructional permits.

²In Delaware, every motorcycle operator or rider age 19 and older must carry an approved helmet.

³In Florida, the law requires that all riders younger than 21 years wear helmets, without exception. Those 21 years and older may ride without helmets only if they can show proof that they are covered by a medical insurance policy.

⁴In Kentucky, the law requires that all riders younger than 21 years wear helmets, without exception. Those 21 and older may ride without helmets only if they can show proof that they are covered by a medical insurance policy. Motorcycle helmet laws in Kentucky also cover operators with instructional/learner's permits.

⁵Motorcycle helmet laws in Maine cover operators with instructional/learner's permits and operators in their first year of licensure. Maine's motorcycle helmet use law also covers passengers 17 and younger and passengers riding with operators who are required to wear a helmet.

⁶In Michigan, the law requires that all riders younger than 21 wear helmets, without exception. Those 21 and older may ride without helmets only if they carry additional insurance and have passed a motorcycle safety course or have had their motorcycle endorsement for at least two years. Motorcycle passengers who want to exercise this option also must be 21 or older and carry additional insurance.

⁷Motorcycle helmet laws in Minnesota cover operators with instructional/learner's permits.

⁸North Dakota's motorcycle helmet use law covers all passengers traveling with operators who are covered by the law.

⁹Ohio's motorcycle helmet use law covers all operators during the first year of licensure and all passengers of operators who are covered by the law.

¹⁰Pennsylvania's motorcycle helmet use law covers all operators during the first two years of licensure unless the operator has completed the safety course approved by PennDOT or the Motorcycle Safety Foundation.

¹¹Rhode Island's motorcycle helmet use law covers all passengers (regardless of age) and all operators during the first year of licensure (regardless of age).

¹²Texas exempts riders 21 or older if they can either show proof of successfully completing a motorcycle operator training and safety course or can show proof of having a medical insurance policy. A peace officer may not stop or detain a person who is the operator of or a passenger on a motorcycle for the sole purpose of determining whether the person has successfully completed the motorcycle operator training and safety course or is covered by a health insurance plan.

¹³Motorcycle helmet laws in Wisconsin cover operators with instructional/learner's permits.

SOURCE: Insurance Institute for Highway Safety, Highway Loss Data Institute, Motorcycle and bicycle helmet use laws, available at www.iihs.org/iihs/topics#statelaws as of June 2015.