California Code, Labor Code - LAB § 7925

(a) Each operator of a permanent amusement ride shall report or cause to be reported to the division immediately by telephone each known accident where maintenance, operation, or use of the permanent amusement ride results in a death or serious injury to any person unless the injury does not require medical service other than ordinary first aid. If a death or serious injury results from the failure, malfunction, or operation of a permanent amusement ride, the equipment or conditions that caused the accident shall be preserved for the purpose of an investigation by the division.

(b) A division inspector may inspect any permanent amusement ride after the report of an accident to the division. The division may order a cessation of operation of a permanent amusement ride if it is determined after inspection to be hazardous or unsafe. Operation shall not resume until these conditions are corrected to the satisfaction of the division.

(c) Whenever a state, county, or local fire or police agency is called to an accident involving a permanent amusement ride covered by this part where a serious injury or death occurs, the nearest office of the division shall be notified by telephone immediately by the responding agency.