Cal. Gov. Code § 33003
For the purposes of this chapter, the following words and phrases shall have the meaning ascribed to them in this section, unless a different meaning is clearly indicated by the context:
"County peace officers" shall comprehend and include all persons duly and regularly appointed under civil service rules and regulations and sworn in as provided by law to perform the duties of undersheriff, chief deputy sheriff, jailers, turnkeys, deputy sheriffs, bailiffs, process servers, constables, deputy constables, motorcycle officers, the head and assistant heads of all divisions of the sheriff's office, and all their regularly appointed deputies, detectives and investigators in the office of the district attorney whose duties are substantially similar to those of peace officers and marshals and deputy marshals. Clerks, bookkeepers, stenographers, and other employees who may have been appointed as deputy sheriffs or deputy marshals but who do not perform the duties of any of the peace officers enumerated and honorary deputy sheriffs or deputy marshals or other persons holding appointments as deputy sheriffs or deputy marshals who receive no compensation therefor and who do not regularly perform particular official duties are not included.
The duly elected, qualified and acting sheriff of any county shall also be included in the phrase "county peace officers."
"County foresters, fire wardens and firemen" shall comprehend and include all persons duly and regularly appointed under civil service rules and regulations to perform the duties of county forester, deputy or assistant county fire wardens, heads and assistant heads of all divisions of any county forester's or county fire warden's department, and all fire apparatus engineers, fire prevention inspectors, forest firemen, fire patrolmen, fire observers and foremen assigned to fire suppression crews, and all other personnel not specifically excluded, who are assigned to fire prevention and suppression in any county forester's or county fire warden's department and the officers, engineers and firemen of any county fire protection district, and all other personnel not specifically excluded, who are assigned to fire prevention and suppression in any fire protection district. Clerks, bookkeepers, stenographers, cooks, laborers, county fire protection district volunteer employees or persons who are not employed for full time duty, or other employees not performing the duties of any of the persons enumerated and any honorary deputy county fire warden or honorary deputy, county forester, or voluntary fire warden holding appointment as such but receiving no compensation therefor and not regularly performing particular official duties are not included.
"City police officers" shall comprehend and include all persons duly and regularly appointed under civil service rules and regulations and sworn in as provided by law to perform the duties of a regular police officer in the organized police department of a municipal corporation.
"City firemen" shall comprehend and include all persons duly and regularly appointed under civil service rules and regulations to perform the duties of a regular fireman in the organized fire department of a municipal corporation.
Ca. Gov. Code § 33003