IP/NIl/NGA/T/2 Page 25 (2) The Registrar may in any case require a,nd retain ~n attested copy of any instrument produced for inspection In proof of title, but such copy shall not be open to public inspection. 76. Where in the case of an application on Form 16 or Form 17 the person applying for registration of his title does not claim under any document or instrument which is capable in itself of furnishing proof of his title, he shall, unless the Registrar otherwise directs, either upon or with the application, state a case setting forth the full particulars of the facts upon which his claim to be proprietor of the trade mark is based, and showing that the trade mark has been assigned or transmitted to him; and if the' Registrar so require, the case shall be verified by a statutory declaration on Form 18. Case accompanying applica tion. 77. The Registrar may call on any person who applies to be registered as proprietor of a registered trade mark for such proof or additional proof of title as he may require for his satisfaction. Proof of title. 78. (l) An application under regulation 73 or regulation 74 of these Regulations relating to an assignment on or after the commencement of the Act of a trade mark in respect of any goods shall state(a) whether the trade mark was, at the time of the assignment, used in a business in any of those goods; and (b) whether the assignment was made otherwise than in connection with the goodwill of that business, and, if both those circumstances subsisted, then the applicant shall leave with the Registrar a copy of the Registrar's directions to advertise the assignment, obtained upon application under section 26(4) of the Act and regulation 81 and such proof, including copies of advertisements or otherwise as the Registrar may require that his directions have been fulfilled; and if the Registrar is not satisfied that the directions have been fulfilled, he shall not proceed with the application. Application for entry of assignment without goodwill. (2) For the purposes of section 35(4) of the Act, the period within which a corporation may be registered as the subsequent proprietor of a registered trade mark, upon application made under regulation 73 or 74 of these Regulations shall be six months from the date of advertisement in the Journal of the registration of the trade mark or such further period not exceeding six months as the Registrar may allow, on application being made to him on Form 15 by the applican t for registration of ti tie or the registered proprietor as the case may be, at any time before or during the period for which the extension can be allowed.