California Code, Family Code - FAM § 6405

(a) There shall be no civil liability on the part of, and no cause of action for false arrest or false imprisonment against, a peace officer who makes an arrest pursuant to a foreign protection order that is regular upon its face, if the peace 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) If there is more than one order issued and one of the orders is an emergency protective order that has precedence in enforcement pursuant to paragraph (1) of subdivision (c) of Section 136.2 of the Penal Code, the peace officer shall enforce the emergency protective order. If there is more than one order issued, none of the orders issued is an emergency protective order that has precedence in enforcement, and one of the orders issued is a no-contact order, as described in Section 6320, the peace officer shall enforce the no-contact order. If there is more than one civil order regarding the same parties and neither an emergency protective order that has precedence in enforcement nor a no-contact order has been issued, the peace officer shall enforce the order that was issued last. If there are both civil and criminal orders regarding the same parties and neither an emergency protective order that has precedence in enforcement nor a no-contact order has been issued, the peace officer shall enforce the criminal order issued last.

(c) Nothing in this section shall be deemed to exonerate a peace 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.