California Code, Penal Code - PEN § 398

(a) If a person owning or having custody or control of an animal knows, or has reason to know, that the animal bit another person, he or she shall, as soon as is practicable, but no later than 48 hours thereafter, provide the other person with his or her name, address, telephone number, and the name and license tag number of the animal who bit the other person. If the person with custody or control of the animal at the time the bite occurs is a minor, he or she shall instead provide identification or contact information of an adult owner or responsible party. If the animal is required by law to be vaccinated against rabies, the person owning or having custody or control of the animal shall, within 48 hours of the bite, provide the other person with information regarding the status of the animal's vaccinations. Violation of this section is an infraction punishable by a fine of not more than one hundred dollars ($100).

(b) For purposes of this section, it is necessary for the skin of the person to be broken or punctured by the animal for the contact to be classified as a bite.