The Chief Commissioner may give a testing direction (other than a direction to give a sample of hair) to a person to whom this Division applies who carries out a designated work function in the course of his or her duty or in the performance of his or her duties if—
(a) the Chief Commissioner gives a direction to every person who is rostered on and who carries out that designated work function in the course of their duty or in the performance of their duties; or
(b) two or more persons have been chosen for testing by random selection from the persons who are rostered on and who carry out the same designated function in the course of their duty or in the performance of their duties.
Division 5—Random testing