23. Certificate of registration [Section 29] Upon the registration of a trade mark the Registrar shall, as required by section 29(2) of the Act, issue to the applicant a certificate on Form O.2. 24. Renewal [Sections 11 and 37] (1) The notice under section 37(3) of the Act shall be sent by the Registrar not less than six months prior to the expiration of the last registration. The notice shall be on Form O.3. (2) If trade marks having the same date of registration and owned by the same proprietor and which were previously registered in different classes fall, for whatever reason, in the same class, such marks shall on renewal be consolidated into one registration having one distinguishing number and shall, for the purposes of these regulations, be deemed to be a single trade mark. (3) On renewal, the Registrar shall be required to make any entries or amendments in the register in order to record changes resulting from a revised or replaced classification resulting from whatever reason. 25. Application for renewal by proprietor [Sections 11 and 37] (1) An application to the Registrar for the renewal of the registration of a trade mark, including a variation of the class, in terms of section 11 of the Act, shall be made on Form TM5 within the period commencing six months prior to the expiration of the last registration and ending six months after the said expiration. (2) Failure to pay the renewal fee before the expiration of the last registration shall attract an additional fee; and failure to pay within the time limit of regulation 25(1) shall attract a further additional fee. 26. If the renewal fee has not been paid before the expiry of the period referred to in regulation 25(1) the Registrar shall advertise the fact forthwith in the Patent Journal. If within one month of such expiration the renewal fee upon Form TM5, together with the additional fees, is received, he 16