For many years a protective helmet was not required in many US states, including California. There was strong rider resistance to such laws or regulations. However, police motorcycle officers wore helmets for safety, to prevent head injuries in an accident. Thus, California along with many other states began to mandate helmets in motorcycling. It's been this way in California for many decades.
All Bicycle riders under 18 are required to wear a helmet
It is recommended that you wear a helmet, but it is not a legal requirement
In Australia it is a national law that people of all ages have to wear a bicycle helmet while they are on theirs bikes.
Anyone under the age of 18 must wear a helmet when riding a bicycle.
To prevent head injuries. -------------------- The same reason other places did--- money.
When, you read a instruction manual on Bicycle Riding, it tells you for safety reasons always wear a helmet.
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.
Depends on where you're at. The law isn't the same everywhere.
Under 21 for a motorcycle and under 16 for a bicycle.
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.
Not for an adult riding on a public road. The landlord may however state something like "a bicycle helmet must be worn when riding on this property". Can't really say what he can do to enforce that though, apart from asking a person either to wear a helmet or to leave the property.
You need to wear a helmet if you don't know how to ride well if you are good or perfect then you don't need a helmet but yeah hope that helped you out.