Although the grant of a Community plant variety right is based on an ex-officio examination, reasons may be given why the CPVO should not have granted protection. For this reason, Article 20 of Regulation (EC) No. 2100/94 (CPVR) provides rules for nullity of a Community plant variety right. Moreover, the right granted should only continue to exist if the variety fulfills after grant of protection the conditions “Uniformity” (Article 8 CPVR) and “Stability” (Article 9 CPVR). If the CPVR no longer complies with these requirements, the CPVO must cancel the right with effect in future according to Article 21 (para. CPVR).