6.—(1) Where a right to priority is claimed by reason of an application for protection of a trade mark duly filed in a Convention country under section 35 or in another country or territory in respect of which provision corresponding to that made by section 35 is made under section 36, particulars of that claim shall be included in the application for registration under rule 5 above and, where no certificate as is referred to in paragraph (2) below is filed with the application, such particulars shall include the country or countries and the date or dates of filing.
(2) Unless it has been filed at the time of the filing of the application for registration, there shall be filed, within three months of the filing of the application under rule 5, a certificate by the registering or other competent authority of that country certifying, or verifying to the satisfaction of the registrar, the date of the filing of the application, the country or registering or competent authority, the representation of the mark, and the goods or services covered by the application.