Section 26: Service by post.

Where an enactment authorised or requires a document to be served by post, whether the word "serve" or some other word is used, then-
(a) the document may be served by posting an envelope-
(i) which contains the document, and
(ii) on which the postage (where any is payable) has been pre-paid, and
(iii) which is addressed to the person on whom it is to be served at his last known address; and
(b) where the provisions of paragraph (a) of this section have been satisfied as respects the document, it shall be deemed to have been served at the time at which the envelope would have been delivered in the ordinary course of post unless it is proved that the envelope was not delivered at that time.