(1) The registration of a collective mark shall be declared invalid on application and cancelled, in addition to the grounds for invalidity listed in section 50, if it has been registered contrary to section 103. If the ground for invalidity relates to the regulations governing use of the collective mark, the registration shall not be declared invalid and cancelled if the proprietor of the collective mark amends the regulations governing use of the collective mark such that the ground for invalidity no longer exists.
(2) The application for a declaration of invalidity in accordance with subsection (1) shall be filed with the German Patent and Trade Mark Office. The procedure shall be governed by section 53.