1. The EU trade mark shall be deemed not to have had, as from the date of the application for revocation or of the counterclaim, the effects specified in this Regulation, to the extent that the rights of the proprietor have been revoked. An earlier date, on which one of the grounds for revocation occurred, may be fixed in the decision at the request of one of the parties.
2. The EU trade mark shall be deemed not to have had, as from the outset, the effects specified in this Regulation, to the extent that the trade mark has been declared invalid.
3. Subject to the national provisions relating either to claims for compensation for damage caused by negligence or lack of good faith on the part of the proprietor of the trade mark, or to unjust enrichment, the retroactive effect of revocation or invalidity of the trade mark shall not affect:
(a) any decision on infringement which has acquired the authority of a final decision and been enforced prior to the revocation or invalidity decision;
(b) any contract concluded prior to the revocation or invalidity decision, in so far as it has been performed before that decision; however, repayment, to an extent justified by the circumstances, of sums paid under the relevant contract may be claimed on grounds of equity.