6. In the event of whole or partial non-compliance with the measures required to be taken pursuant to the exercise of the powers under paragraph 1, points (a), (b) and (c), and after the expiry of a period of at least 30 calendar days from the date on which the critical ICT third-party service provider received notification of the respective measures, the Lead Overseer shall adopt a decision imposing a periodic penalty payment to compel the critical ICT third-party service provider to comply with those measures.