Article 6quater

(1) When, in accordance with the law of a country of the Union, the assignment of a mark is valid only if it takes place at the same time as the transfer of the business or goodwill to which the mark belongs, it shall suffice for the recognition of such validity that the portion of the business or goodwill located in that country be transferred to the assignee, together with the exclusive right to manufacture in the said country, or to sell therein, the goods bearing the mark assigned.

(2) The foregoing provision does not impose upon the countries of the Union any obligation to regard as valid the assignment of any mark the use of which by the assignee would, in fact, be of such a nature as to mislead the public, particularly as regards the origin, nature, or essential qualities, of the goods to which the mark is applied.