(a)a National Faceless Assessment Centre to facilitate the conduct of faceless assessment proceedings in a centralised manner including assigning the case selected for the purposes of faceless assessment under this section to a specific assessment unit, intimating the assessee that assessment in his case shall be completed in accordance with the provision of this section, serving a notice to the assessee under section 268(1) or 270(8), and forwarding any response of the assessee to the assessment unit;