S. 144B : Faceless Assessment-Principles of natural justice-At least 21 days time should be given to file reply-Legislative Intent is to provide an opportunity of being heard to the assessee before passing any orders, which are prejudicial to their rights/interests-It is bounden duty of the Assessing Officer to pass a detailed order, providing reasons for rejection of the contention of the assessee-Matter restored to the file of the AO as the assessee was granted time of 5 days only without referring to opportunity of personal hearing.[Art. 226]