California CodesBusiness and Professions Code - BPCDivision 9 — Alcoholic BeveragesChapter 16 — Regulatory ProvisionsArticle 3 — Women and MinorsSection 25658.2

(a) A parent or legal guardian who knowingly permits his or her child, or a person in the company of the child, or both, who are under the age of 18 years, to consume an alcoholic beverage or use a controlled substance at the home of the parent or legal guardian is guilty of misdemeanor if all of the following occur:

(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.

(b) A person who violates subdivision (a) shall be punished by imprisonment in a county jail for a term not to exceed one year, by a fine not exceeding one thousand dollars ($1,000), or by both imprisonment and fine.