128. The Tribunal may, on its own initiative or on the request of an interested person or organization, revise or revoke any decision it has rendered provided that it has not been executed or appealed from,
(1) where a new fact is discovered which, if it had been known in due time, might have justified a different decision;
(2) where an interested person or organization was unable, for reasons deemed sufficient, to be heard;
(3) where a substantive or procedural defect is likely to invalidate the decision.
However, in the case described in subparagraph 3 of the first paragraph, a judge of the Tribunal cannot revise or revoke a decision rendered on an application heard by him.