In this section, “Prince George’s County fire and explosive investigator” means an individual who: is assigned full time to the Fire and Explosive Investigations Section of the Prince George’s County Fire/EMS Department; has attained the position of deputy fire marshal; and has successfully completed a training program from a police training school approved by the Maryland Police Training and Standards Commission established under Title 3, Subtitle 2 of the Public Safety Article. Except as provided in subsection (c) of this section, a Prince George’s County fire and explosive investigator has the same authority granted to the State Fire Marshal or a full–time investigative and inspection assistant of the Office of the State Fire Marshal under § 2–208 of this subtitle: while operating in Prince George’s County; and while operating outside Prince George’s County when: the Prince George’s County fire and explosive investigator is participating in a joint investigation with officials from another state, federal, or local law enforcement unit, at least one of which has local jurisdiction; the Prince George’s County fire and explosive investigator is rendering assistance to another law enforcement officer; the Prince George’s County fire and explosive investigator is acting at the request of a law enforcement officer or State law enforcement officer; or an emergency exists. The Prince George’s County Fire Chief: may limit the authority of a Prince George’s County fire and explosive investigator under this section; and shall express the limitation in a written policy.