(a) A member of a fire company who has been appointed and qualified as a fire police officer may thereafter, for the term of the member's appointment, act as such anywhere in the county in which the fire company making the appointment is located or in any other county of the State in which the member is called upon to act.
(b) Subject to prior written approval by the fire chief, a fire police officer may be granted permission to:
(1) Assist the fire officer-in-charge, and also assist law enforcement officers as defined in § 9200(b) of Title 11, anywhere within the State;
(2) Assist the fire officer-in-charge, and also assist law enforcement officers in out-of-state districts bordering the State, with authority of the bordering district;
(3) Assist at the scene of any potential emergency incident encountered by the fire police officer, and to remain on duty until released by the authorized fire officer or law enforcement officer in charge; and
(4) Perform other special duties as may be requested and approved by the fire chief.