19. The Régie may review or revoke any of its decisions(1) where a new fact is discovered which, if it had been known in due time, would have justified a different decision;
(2) where a person interested in the issue was, for reasons considered satisfactory, unable to present observations;
(3) where a procedural defect is likely to invalidate the decision.
Except in exceptional circumstances, the Régie shall not accept a request for review or revocation filed more than 180 days after the date on which the decision was made.
1990, c. 13, s. 19; 1997, c. 43, s. 364.