Article 6U.K.Establishment a posteriori of invalidity or revocation of a trade mark
Where the seniority of a national trade mark or of a trade mark registered under international arrangements having effect in the Member State, which has been surrendered or allowed to lapse, is claimed for an EU trade mark, the invalidity or revocation of the trade mark providing the basis for the seniority claim may be established a posteriori, provided that the invalidity or revocation could have been declared at the time the mark was surrendered or allowed to lapse. In such a case, the seniority shall cease to produce its effects.