“Any notice or other document to be given … under the Taxes Acts may be served by post, and, if to be given ... to… any person by the Board, by any officer of the Board, or by or on behalf of any body of Commissioners, may be so served addressed to that person:
“Where an Act authorises or requires any document to be served 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 at which the letter would be delivered in the ordinary course of post.”
“(1) The overriding objective of these [Tribunal Rules] is to enable the Tribunal to deal with cases fairly and justly.
“In the context of an appeal right which must be exercised within 30 days from the date of the document notifying the decision, a delay of more than three months cannot be described as anything but serious and significant.”