S. 151 : Sanction for issue of notice-Reassessment proceedings are initiated beyond three years from the end of the relevant assessment year; prior sanction must be obtained from the specified authority under section 151(ii); sanction by any other authority is without jurisdiction and renders the reassessment proceedings invalid; SLP of the Revenue dismissed. [S. 147, 148, 148A(b), 151(ii), Art. 136]