Anything done or any action taken (including any application admitted or orders passed) by the Central Administrative Tribunal or any of its Bench or Benches immediately before the commencement of this Act in the exercise or purported exercise of its jurisdiction, powers and authority conferred by or under the principal Act shall be deemed to have been validly done or taken as if the provisions of the principal Act, as amended by this Act had been in force at all material times and, accordingly, anything done or any action taken by the said Tribunal or any of its Bench or Benches shall not be called in question merely on the ground that--
         (a) the Bench or Benches of such Tribunal had not been properly constituted, or
         (b) the said Tribunal had no jurisdiction to adjudicate or try any dispute or complaint or to hear any appeals in relation to such dispute or complaint