California's insurance policies are more strange, due to proposition 103, passed in 1988.

It creates a condition where the state can prohibit insurers from selling to residents, if it doesn't like their prices, which has recently lead to a lot of insurers no longer selling in the state, as construction prices in the state have risen significantly faster than inflation, leading to insurance premiums that the state doesn't like.

Residents who no longer have any insurers available can buy insurance from the state, but its far more expensive than the plans it rejected from private insurers.