The Governor of California has until September to sign a bill into law that will require minors in California to wear a helmet when skiing or snowboarding.

The state Senate on Wednesday voted 21-11 to pass SB880, which requires helmets for snowboarders and skiers under 18.

The helmet law would be the country’s most restrictive if Gov. Arnold Schwarzenegger signs the legislation. The fine, however, would top out at $25.

The bill would require resorts to post signs about the law on trail maps, websites and other locations throughout the property.

There already is a bicycle, skate and skateboard helmet law for minors in California and a wealth of information on bike helmet laws at the Bike Helmet Safety Institute.