(a) Notwithstanding any provision of this code to the contrary, the board may allow, consistent with this section, an investigator employed or contracted by the board to carry a concealed firearm while performing his or her official duties.

(b) An investigator employed by the board or contracted by the board may carry a concealed firearm while performing his or her official duties solely for the purposes of defense of self or others if the investigator has:

(1) Obtained approval by a majority vote of the board;

(2) Been determined not to be prohibited from possessing a firearm under state or federal law;

(3) Obtained and maintains a concealed handgun license pursuant to § 61-7-1 et seq. of this code; and

(4) Successfully completed a firearms training and certification program equivalent to that provided to officers attending an entry level law-enforcement certification course provided at the West Virginia State Police Academy. The investigator must thereafter successfully complete an annual firearms qualification course equivalent to that required of certified law-enforcement officers as established by legislative rule. The board may reimburse the investigator for the cost of the training and requalification.

(c) Neither the state, a political subdivision, an agency, nor an employee of the state acting in an official capacity may be held personally liable for an act of an investigator employed by the board if the act or omission was done in good faith while the investigator was performing official duties on behalf of the board.