Is there a wildfire law that prevents or limits the installment of eave vents on residential homes in the hill areas in the state of California?

There are certain regional restrictions on the intake venting of homes where there is a heightened risk of wildfire

There are certain regional restrictions on the intake venting of homes where there is a heightened risk of wildfire to inhibit embers from entering the attic area to ignite the home. Check the local code.