California Code, Public Utilities Code - PUC § 24450

(a) Locate and notify the owner or person in charge of the aircraft of his or her name and address, and upon being requested to do so by the owner of the aircraft or person in charge of the aircraft, present his or her driver's license or pilot's license for identification purposes.

(b) Leave in a conspicuous place on the aircraft a written notice giving his or her name, address, and telephone number and a statement of the circumstances thereof, and, without unnecessary delay, notify the nearest safety representative of the Federal Aviation Administration.