The chairperson may appoint as many sessional commissioners as are required to help the chairperson to perform the commission’s functions or exercise the commission’s powers by—
(a) conducting a hearing for a crime investigation, corruption investigation or the intelligence function; or
(b) examining 1 or more witnesses, and reporting on the examination to the chairperson, for a crime investigation, corruption investigation or the intelligence function; or
(c) conducting a specific investigation relevant to the commission’s functions.