When a demand notice is served and an appeal or proceeding is filed or initiated with respect to the amount specified in the notice of demand (by the assessee) then such demand is valid till the appeal is disposed by the appellate authority or disposal of proceedings, and any such notice of demand shall have the effect as specified in section 3 of the Taxation Laws (Continuation and Validation of Recovery Proceedings) Act, 1964 (11 of 1964).]
