Article 21a 4.

Where the Commission finds, on the basis of the best scientific knowledge, evidence and data, such as data from the European Centre for Disease Prevention and Control, confirming the persistence of the COVID-19 pandemic, that refusals, limitations or impositions of conditions on the exercise of traffic rights by Member States are likely to be necessary beyond the period referred to in paragraph 1 of this Article, the Commission shall adopt delegated acts in accordance with Article 25a to amend this Regulation by extending that period accordingly.