81.—(1) An application by the registered proprietor of a certification trade mark for variation of the deposited regulations under section 68(13)(a) of the Act and the consent of the Registrar thereto shall be made by filing Form T.M. 30.
(2) Where the Registrar causes such an application to be advertised, the time within which any person may give to him notice of opposition to the application shall be one month from the date of the advertisement.