From the California Bicycle Helmet Statute West's Annotated California Codes; Vehicle Codes; Division 11. Rules of the road; Chapter 1. Obeidience to and effect of traffic laws; Article 4. Operation of bicycles:
(a) A person under 18 years of age shall not operate a bicycle, or ride upon a bicycle as a passenger, upon a street, bikeway, as defined in Section 890.4 of the Streets and Highways Code, or any other public bicycle path or trail unless that person is wearing a properly fitted and fastened bicycle helmet that meets the standards of the American National Standards Institute (ANSI Z 90.4 bicycle helmet standard), the Snell Memorial Foundation's Standard for Protective Headgear for Use in Bicycling, or the American Society for Testing Materials (ASTM F-1447 standard). This requirement also applies to a person who rides upon a bicycle while in a restraining seat that is attached to the bicycle or in a trailer towed by the bicycle.
No, Wisconsin does not have a bicycle helmet law, but it is good to wear one to protect your head and your brain from severe damage.
It is recommended that you wear a helmet, but it is not a legal requirement
To prevent head injuries. -------------------- The same reason other places did--- money.
That depends on the relevant law in the country you're asking about.In the UK for example it is not a requirement of law to wear one, but it is sensible advice to anyone riding a bicycle.
1992.
Anyone under the age of 18 must wear a helmet when riding a bicycle.
A bicycle helmet is a piece of protective headgear intended to be worn while riding a bicycle.
In Australia it is a national law that people of all ages have to wear a bicycle helmet while they are on theirs bikes.
2003
Depends on where you're at. The law isn't the same everywhere.
Depends on where you are, the law is different from place to place.
The law isn't the same all over, so it depends on where you're at and how old you are.