(1) This section applies to a rail safety officer who is exercising, or about to exercise, a function under this Act.(2) A rail safety officer must (a) display his or her identification card if the officer is not wearing an approved uniform or badge; or(b) produce his or her identification card if requested to do so by a person in relation to whom the officer is exercising, or is about to exercise, the function.(3) If it is not practical for a rail safety officer to produce his or her identification card on being requested to do so, the rail safety officer must produce his or her identification card as soon as practicable after the request is made.(4) In this section approved , in relation to a uniform or badge worn by a rail safety officer, means a uniform or badge approved by the Rail Safety Regulator.