14 No. 12 Trade and Service Marks 1986 and the trade or service mark, when registered, shall be registered as of the date on which the application for registration was received, and that date shall be deemed, for the purposes of this Act, to be the date of registration, provided that the foregoing provisions of this subsection, relating to the date as of which a trade or service mark shall be registered and to the date to be deemed to be the date of registration, shall, as respects a trade or service mark registered under this Act with the benefit of priority under the Convention, have effect subject to the provisions of the Convention. (2) on the registration of a trade or service mark, the Registrar shall cause to be sealed and shall issue to the applicant a certificate in the prescribed form of the registration thereof PART VI DURATION AND RENEWAL OF REGISTRATION Term of registration and renewal 29.- (1) The registration or a trade or service mark shall be for a period of seven years from the date of registration but may be renewed from time to time in accordance with the provisions of this section. (2) Subject to subsection (4), the Registrar shall on application made by the registered proprietor of a trade or service mark in the prescribed manner and within the prescribed period, renew the registration of the trade or service mark for a period of ten years from the date of expiration of original registration or of the last renewal of registration. the date which is referred to in this section as the ''expiration of the last registration'' , provided that the registered proprietor(a) submits a statement confirming those goods or services described in the registration in respect of which there has been bonafide use of the trade or service mark in Tanzania at any time during the three years immediately preceding the expiration of the last registration, together with a reproduction of the trade or service mark which has been used as aforesaid; or (b) established, to the satisfaction of the Registrar that special circumstances prevented use of the trade or service mark in respect of any of the goods or services described in the registration during the aforesaid period and confirms that there has been no intention to abandon the trade or service mark in respect of those goods or services. (3) For the purposes of subsection (2) (a) the use of the whole of a registered trade or service mark shall be deemed to be equivalent to the use of any registered trade or service mark being a part thereof, registered in the name of the same proprietor by virtue of section 25 (1); (b) where a trade or service mark has been used in relation to some, but not all of the goods or services in respect of which it is registered, such use shall be deemed to be equivalent to the use of the trade or service mark in relation to all closely related goods or services in respect of which it is registered;