S. 147 : Reassessment-After the expiry of four years-Shah Commission’s report- Cash credit -Under-invoicing -Merely on basis of Shah Commission’s Report opining that there was under-invoicing of export price by iron-ore miners and exporters, reassessment could not be initiated when there was nothing to indicate that any particular income had accrued to anyone as a result of price difference-Notice based on report of commission is held to be not valid. [S. 28(1) , 68 ,148]