“Where an Act authorises or requires any document to be sent by post (whether the expression “serve” or the expression “give” or “send” or any other expression is used) then unless the contrary intention appears, the service is deemed to be effected by properly addressing, pre-paying and posting a letter containing the document, and unless the contrary is proved, to have been effected at the time the letter would have been delivered in the ordinary course of post.”
“ Any notice or other document to be given sent or delivered under the Taxes Acts may be served by post…”