The Cities of Chesapeake, Hampton, Newport News, Portsmouth, Richmond, and Virginia Beach may provide that the agency charged with the enforcement of local ordinances adopted pursuant to §§ 15.2-901, 15.2-903, 15.2-904, 15.2-905, and 15.2-908 or city charter relating to the external maintenance of property or local zoning ordinances relating to motor vehicles or trailers as defined in § 46.2-100 may utilize supervised, trained, and qualified volunteers to issue notices of noncompliance with such ordinances. Such volunteers shall have any and all immunity provided to an employee of the locality doing an identical job.