A counterclaim for revocation or for a declaration of invalidity may only be based on the grounds for revocation or invalidity mentioned in this Regulation.
Ní fhéadfar frithéileamh ar chúlghairm nó ar dhearbhú neamhbhailíochta a bhunú ach ar na forais le haghaidh cúlghairme nó neamhbhailíochta atá luaithe sa Rialachán seo.