Whenever any person is conveyed in or makes use of any vehicle, aircraft or vessel which is the property of the State, the State or a person in the service of the State shall not be liable to such person or his or her spouse, parent, child or other dependant for any loss or damage resulting from any bodily injury, loss of life or loss of or damage to property caused by or arising out of or in any way connected with the conveyance in or the use of such vehicle, aircraft of vessel, unless such person is so conveyed or makes use thereof in, or in the interest of, the performance of the functions of the State: Provided that the provisions of this section shall not affect the liability of a person in the service of the State who wilfully causes the said loss or damage.