154. The Tribunal, on an application, may review or revoke any decision it has made
(1) where a new fact is discovered which, had it been known in time, could have warranted a different decision;
(2) where a party, owing to reasons considered sufficient, could not be heard;
(3) where a substantive or procedural defect is of a nature likely to invalidate the decision.
In the case described in subparagraph 3, the decision may not be reviewed or revoked by the members having made the decision.