S. 147 : Reassessment-Beyond four years-Explanation 3, to S.147 by Finance (No. 2) Act, 2009-After issuing a notice under S. 148, he accepts the contention of the assessee and holds that the income which he has initially formed a reason to believe had escaped assessment, has as a matter of fact not escaped assessment, it is not open to him independently to assess some other income-If he intends to do so, a fresh notice under S.148 would be necessary- Assessing Officer has no power to reassess other income not mentioned in notice under S 148. [S. 148]