The requirement on reporting is stated in the Internal Regulations chapter 4. The document can be found here. Internal Regulations
The requirement on reporting applies only to active Service Providers
Active Service Providers are Service Providers that have a Production Certificate and fullfill one or more of the following criterias:
Sent documents via the Peppol Network
Received documents via the Peppol Network
Registered End Users with receiving capability in a SMP.
Manage space
Manage content
Integrations