The bill SB 105 would enforce a $25 fine on parents if their children were found without helmets on.
The proposed law also requires resorts to warn skiers and boarders of the requirements by posting warning notices by the pistes and on their websites and printed trail maps.
"When you have thousands of accidents where there are brain injuries of some sort, nearly half of those injuries could have been prevented if the youngsters wore a helmet." said Democratic Senator Leland Yee of San Francisco who proposed the bill which was passed by California's senate last week and now awaits the final approval or rejection by the governor.
New Jersey became the first US state to introduce a law requiring children to wear helmets for snowsports earlier this winter. A number of US ski resorts already require their staff working on the slopes and everyone taking ski school classes to wear helmets. Similar laws requiring children to wear helmets when participating in snow sports ave been in place in France and Italy for some years.