Continuance of textual amendments: repeal of an Act does not undo prior insertions, substitutions, or omissions absent contrary intention. Where a later Central Act or Regulation repeals an enactment that effected a textual amendment of any Central Act or Regulation by express omission, insertion or substitution, the repeal does not disturb the continued operation of that textual amendment in force at the time of repeal, unless a different intention appears in the repealing enactment.