art 30 Irregularities
(1) Any irregularity resulting from failure to comply with any provision of these Rules or of any direction of the Tribunal before the Tribunal has reached its decision shall not of itself render the proceedings void, but the Tribunal may, and shall if it considers that any person may have been prejudiced by that irregularity, give such directions or take such steps as it thinks fit before reaching its decision to cure or waive the irregularity, whether by amendment of any document, the giving of notice or otherwise. (2) Clerical mistakes in any document recording or certifying a direction, decision or determination of the Tribunal or president, or errors arising in such document from an accidental slip or omission, may at any time be corrected by the president by certificate signed by him.