California Code, Government Code - GOV § 9194.5

The Sergeant at Arms and Assistant Sergeants at Arms of each house shall have the powers and authority conferred by law upon peace officers listed in Chapter 4.5 (commencing with Section 830) of Title 3 of Part 2 of the Penal Code in all parts of the state in carrying out their duties, and shall not be liable to civil action for their acts in carrying out the orders of a Member of the Legislature presiding over any legislative proceeding, including sessions of the Legislature or either house thereof and hearings of legislative committees, or in carrying out the orders of a member to have any person removed from the office of the member, if the Sergeant at Arms or Assistant Sergeant at Arms acts without malice and in the reasonable belief that the member has the authority to issue the order.