 A privative clause will declare the ADMs decision is "final and conclusive" and/or that the ADM has "exclusive jurisdiction" over the matter, effectively removing any power of review.As established in "Crevier v Quebec (AG)", [1981] 2 SCR 220, the Constitution requires that the courts be able to supervise errors of ADMs and so the legislature cannot completely oust them from that power, nor can an ADM completely replace a Superior Court.The courts' power of substantive review allows it to consider the content of an ADM's decision and decide whether it was sufficiently incorrect to warrant sending it back for reconsideration.