What legal basis may apply to monitoring in public administration entities?

ANSWER

Public authorities should, in principle, rely on provisions that permit or require monitoring. For public bodies, the appropriate basis will therefore usually be the performance of a legal obligation on the controller, or the performance of a task carried out in the public interest or in the exercise of public authority entrusted to the controller, i.e. Article 6(1)(c) GDPR (performance of a legal obligation on the controller) or Article 6(1)(e) GDPR (performance of a public task).