The doctrine of functus officio provides that once an adjudicator has done everything necessary to perfect her decision, she is barred from revisiting that decision, other than to correct clerical or other minor errors. The policy rationale underlying this doctrine is the need for finality in proceedings: Chandler v. Alberta Association of Architects, 1989 CanLII 41 (SCC), [1989] 2 S.C.R. 848, at 861-2.
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