California Code, Business and Professions Code - BPC § 25658.2

(1) As the result of the consumption of an alcoholic beverage or use of a controlled substance at the home of the parent or legal guardian, the child or other underage person has a blood-alcohol concentration of 0.05 percent or greater, as measured by a chemical test, or is under the influence of a controlled substance.

(2) The parent knowingly permits that child or other underage person, after leaving the parent's or legal guardian's home, to drive a vehicle.

(3) That child or underage person is found to have caused a traffic collision while driving the vehicle.