Commonwealth Consolidated Acts Commonwealth Consolidated Acts(1) The Minister may, in exceptional circumstances, issue a conclusive certificate in relation to a security clearance decision, or security clearance suitability assessment, that is an externally reviewable decision if the Minister believes that:
(a) it would be prejudicial to security to change the decision or assessment; or
(b) it would be prejudicial to security for the decision or assessment to be reviewed.
(2) The Administrative Appeals Tribunal must not review, or
continue to review, a security clearance decision or security clearance
suitability assessment in relation to which the Minister has issued a
conclusive certificate under subsection (1).