Vehicle Code § 2806.5

2806.5.

(a) A peace officer making a traffic or pedestrian stop, before engaging in questioning related to a criminal investigation or traffic violation, shall state the reason for the stop. The officer shall document the reason for the stop on any citation or police report resulting from the stop.

(b) Subdivision (a) does not apply when the officer reasonably believes that withholding the reason for the stop is necessary to protect life or property from imminent threat, including, but not limited to, cases of terrorism or kidnaping.

(c) This section shall become operative on January 1, 2024.