S. 147 : Reassessment–After the expiry of four years-Change of opinion-Amalgamation-Valuation of shares-Advertisement and Business Promotion on medical practioners-Reopening on same material with a view to take another view is held to be not valid-Notice and order disposing the objection was quashed. [S. 37(1), 56(2)(viib), 148, Art. 226]