91AA Employment after selection on merit
(1) In this section, the selection on merit of a temporary employee means employment after some form of open competition involving the selection of the employee as the person who, in the opinion of the Commissioner, has the greatest merit among candidates for employment.(2) A temporary employee may be employed for a period exceeding 12 months at any one time only if the employee is selected on merit.(3) The Commissioner may exempt the employment of a person from subsection (2) if the Commissioner determines that the special circumstances of the case justify the exemption.

Section 91AA