(1)Any notice, notification or requirement that is to be or may be served on, given to or imposed on any person for the purposes of any provision made by or under this Part may be served, given or imposed by sending it to that person or his tax representative by post in a letter addressed to that person or representative at the latest or usual residence or place of business of that person or representative.
(2)Any direction required or authorised by or under this Part to be given by the Commissioners may be given by sending it by post in a letter addressed to each person affected by it at his latest or usual residence or place of business.
(3)Any direction, notice or notification required or authorised by or under this Part to be given by the Commissioners may be withdrawn or varied by them by a direction, notice or notification given in the same manner as the one withdrawn or varied.