In our considered and humble opinion, no procedure for grant of approval has been provided u/s.153D of the Act and the Income tax Rules, 1962. However, when legislature has enacted some provision to be exercised by a higher revenue authority enabling the AO to pass assessment or reassessment orders in the search cases, then, it is the duty of the approving authority to exercise such power by applying his judicious, vigilant and cautious efforts. We are of the view that the obligation on the approval granting authority is of two folds, one the one hand, he has to apply his mind to secure in-build for the department against any omission or negligence by the AO in taxing right income in the hands of right person in the right assessment year and on the other hand he is also responsible and duty bound to do justice with the taxpayer/assessee by granting protection against arbitrary or unjust or unsustainable exercise and decision by the AO crating baseless tax liability on the assessee and thus he has to discharge his duties as superior authority. Thus, granting approval u/s.153D of the Act is not merely an official formality but it is a supervisory act which requires proper application of administrative and judicial skill by the authority on the application of mind and this exercise should be discernible from the order of approval u/s.153D of the Act