64. In our considered view, abatement of the six AYs' or the “ relevant assessment year ” under Section 153C would follow the formation of opinion and satisfaction being reached that the material received is likely to impact the computation of income for a particular AY or AYs' that may form part of the block of ten AYs'. Abatement would be triggered by the formation of that opinion rather than the other way around. This, in light of the discernibly distinguishable statutory regime underlying Sections 153A and 153C as explained above. While in the case of the former, a notice would inevitably be issued the moment a search is undertaken or documents requisitioned, whereas in the case of the latter, the proceedings would be liable to be commenced only upon the AO having formed the opinion that the material gathered is likely to inculpate the assessee. While in the case of a Section 153A assessment, the issue of whether additions are liable to be made based upon the material recovered is an aspect which would merit consideration in the course of the assessment proceedings, under Section 153C, the AO would have to be prima facie satisfied that the documents, data or asset recovered is likely to “ have a bearing on the determination of the total income ”. It is only once an opinion in that regard is formed that the AO would be legally justified in issuing a notice under that provision and which in turn would
