California Code, Family Code - FAM § 6455

(a) There shall be no civil liability on the part of, and no cause of action for false arrest or false imprisonment against, a law enforcement officer who makes an arrest pursuant to a Canadian domestic violence protection order that is regular upon its face, if the law enforcement officer, in making the arrest, acts in good faith and has reasonable cause to believe that the person against whom the order is issued has notice of the order and has committed an act in violation of the order.

(b) Nothing in this section shall be deemed to exonerate a law enforcement officer from liability for the unreasonable use of force in the enforcement of the order. The immunities afforded by this section shall not affect the availability of any other immunity that may apply, including, but not limited to, Sections 820.2 and 820.4 of the Government Code.