person about to be registered as such, may, if he so desires, give upon Form TM/SM 27 an address for service in the register and such address may be treated as the actual address of that person for all purposes connected with the matter in question. (3) All application on Form TM/SM 27 under this Regulation shall be signed by the applicant for registration or the registered proprietor or registered user, as the case may be, or by an agent expressly authorized for the purposes of such an application, unless in exceptional circumstances the Registrar otherwise allows. (4) In any case in which no address for service is entered in the register, the Registrar may treat the trade or business address of registered proprietor or registered user as therein entered as his address for service for all purposes connected with the registration. (5) Any written communication addressed to a party or person as aforesaid at an address given by him, or treated by the Registrar, as his address for service shall be deemed to be properly addressed. (6) The Registrar, at any time that a doubt arises as to the continued availability of an address for service entered in the register, may request the person for whom it is entered, by letter addressed to his trade or business address in the register to confirm the address for service, and if within three months of making such a request the Registrar receives no confirmation of that address, he may strike it off the register. 11. Agents (1) Except as otherwise required by these Regulations, any application, request or notice which is required or permitted under the Act or these Regulations to be made or given to the Registrar or the Court, and all other communications between an applicant or a person making such a request or giving such a notice and the Registrar, or the Court, and between the registered proprietor or a registered user of a mark shall be signed, made or given by or through an agent. (2) Any such applicant, person making request or giving notice, proprietor, or registered user may appoint an agent to act for him in any proceeding or matter before or affecting the Registrar or the Court under the Act and these Regulations by signing and sending to the Registrar or the Court as the case may be, an authority to that effect in the Form TM/SM 1 or in such other written form as the Registrar or the Court may deem sufficient. In case of such appointment, service upon the agent of any document relating to the proceeding or matter shall be deemed to be service upon the person so appointing him, all communications directed to be made to such person in respect of the proceeding or matter may be addressed to such agent, and all attendances upon the Registrar relating thereto may be made by or through such agent. In any particular case the Registrar may require the personal signature or presence of an applicant, opponent proprietor, registered user or other person. (3) Any person– (a) being of Tanzania nationality; (b) having a domicile or place of business in Tanzania; (c) having obtained an advocate's license by the High Court; or (d) having a business, after the approval by the Registrar of Marks, on successful passing an examination conducted by the Registrar; or (e) being a member of the Chartered Institute of Trade and Service marks Agents. (4) There shall be kept by the Registrar of Trade and Service Marks a register to be known as the Register of Trade and Service Marks Agents in which shall be entered the name of each person who is entitled to be registered under subregulation (3) together with his business address, the qualifications and such other particulars as the Registrar may deem fit to include.