The following persons are peace officers whose authority extends to any place in the state for the purpose of performing their primary duty or when making an arrest pursuant to

Section as to any public offense with respect to which there is immediate danger to person or property, or of the escape of the perpetrator of that offense, or pursuant to

Section or of the Government Code. Those peace officers may carry firearms only if authorized and under terms and conditions specified by their employing agency. (

a) Persons designated as a security officer by a municipal utility district pursuant to

Section of the Public Utilities Code, if the primary duty of the officer is the protection of the properties of the utility district and the protection of the persons thereon. (

b) Persons designated as a security officer by a county water district pursuant to

Section of the Water Code, if the primary duty of the officer is the protection of the properties of the county water district and the protection of the persons thereon. (

c) The security director of the public utilities commission of a city and county, if the primary duty of the security director is the protection of the properties of the commission and the protection of the persons thereon. (

d) Persons employed as a park ranger by a municipal water district pursuant to

Section 71341.5 of the Water Code, if the primary duty of the park ranger is the protection of the properties of the municipal water district and the protection of the persons thereon.