California Code, Penal Code - PEN § 830.55

(b) A correctional officer shall have no right to carry or possess firearms in the performance of his or her prescribed duties, except, under the direction of the superintendent of the facility, while engaged in transporting prisoners, guarding hospitalized prisoners, or suppressing riots, lynchings, escapes, or rescues in or about a detention facility established pursuant to Section 2910.5 or 4115.55 of this code or Section 1753.3 of the Welfare and Institutions Code.

(c) Each person described in this section as a correctional officer, within 90 days following the date of the initial assignment to that position, shall satisfactorily complete the training course specified in Section 832. In addition, each person designated as a correctional officer, within one year following the date of the initial assignment as an officer, shall have satisfactorily met the minimum selection and training standards prescribed by the Board of State and Community Corrections pursuant to Section 6035. Persons designated as correctional officers, before the expiration of the 90-day and one-year periods described in this subdivision, who have not yet completed the required training, may perform the duties of a correctional officer only while under the direct supervision of a correctional officer who has completed the training required in this section, and shall not carry or possess firearms in the performance of their prescribed duties.

(d) This section shall not be construed to confer any authority upon a correctional officer except while on duty.

(e) A correctional officer may use reasonable force in establishing and maintaining custody of persons delivered to him or her by a law enforcement officer, may make arrests for misdemeanors and felonies within the local detention facility pursuant to a duly issued warrant, and may make warrantless arrests pursuant to Section 836.5 only during the duration of his or her job.