"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, prepaying 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."
"The employers in their skeleton argument on this issue argue that the second part ofsection 7 of the Interpretation Act 1978 only comes into operation in a case where, under the legislation to which section 7 is being applied, the document has to be received by a certain time. That argument has not been pursued orally by Mr. McMullen on behalf of the employers, but we shall none the less deal with it because it is set out in some detail in the documents lodged on behalf of the employers, and also because it was a matter to which the industrial tribunal applied its mind."
"We conclude that rule 7(7) of the Industrial Tribunals Rules of Procedure 1993 is to be interpreted in accordance withsection 7 of the Interpretation Act 1978 and that the period of 21 days begins with the date of deemed service in the ordinary course of post unless the contrary is proved. In the present case, it was proved that the order was delivered on25 November 1996 , and the consequence is that payment of the deposit on13 December 1996 was within the period of 21 days. The applicant's cross-appeal will therefore be allowed."
"The clerk shall transmit the documents referred to in paragraphs (2) and (3) to the Secretary who shall enter them in the Register and shall send a copy of the entry to each of the parties and where the proceedings were referred to the tribunal by a court, to that court."