Can I travel internationally while my CCF challenge is pending?

Technically yes, but with substantial risk. The Green Notice remains active throughout the CCF review process unless interim measures are granted, meaning border authorities in any member state may still flag or question you, and in some cases detain you. Some jurisdictions are more aggressive than others in acting on Green Notices. Requesting expedited review or interim protective measures from the CCF can reduce exposure, though such measures are not granted routinely and require documented urgency.