California Code, Government Code - GOV § 3257

(1) Disciplinary action or other recrimination shall not be taken against a firefighter refusing to submit to a lie detector test.

(2) No comment shall be entered anywhere in the investigator's notes or anywhere else that the firefighter refused to take, or did not take, a lie detector test.

(3) Testimony or evidence to the effect that the firefighter refused to take, or was subjected to, a lie detector test shall not be admissible at a subsequent hearing, trial, or proceeding, judicial or administrative.