S. 159 : Legal representatives –Notice or order on dead person or wound up company is a nullity subject to condition that the department is made aware of the death or winding up. If the assessee participated in the proceedings and thereafter has taken the plea that order or notice was served on dead person , wound-up company are nullity. In such cases, the assessment is liable to be set-aside for a fresh assessment in accordance with law instead of its annulment.[ S.163, 176 ]