Article 27 requires all parties involved, including destination providers, to cooperate in good faith so the switching process is effective, data is transferred on time, and service continuity is maintained. A provider checklist should therefore keep evidence of the handoffs, not only the final export file.
The review output should be a service-level evidence pack that a legal, product, security, support, or engineering reviewer can retest. Each checklist item should show the source article, owner, result, evidence artifact, remediation status, and next review trigger.