(1) The Secretary may review the performance of a member of the Principal Class.
(2) The review must—
(a) be conducted in accordance with the principles (if any) determined under sub-section (3); and
(b) have regard to any performance criteria contained in the member's contract of employment.
(3) The Secretary may determine principles to govern the conduct of any review under this section.
(4) The Secretary must ensure that any principles determined under sub-section (3) are published.
(5) Nothing in this section prevents an inquiry into a member's performance being conducted at any time if required for the purposes of Division 8 or 10.