If, for any reason a vacancy (other than a temporary absence) occurs in the office of the Chairman or any other member of a Tribunal, such vacancy shall be filled by a person to be nominated in this behalf by the Chief Justice of India in accordance with the provisions of sub-section (2) of section 4, and the investigation of the matter referred to the Tribunal may be continued by the Tribunal after the vacancy is filled and from the stage at which the vacancy occurred.