Article 20 establishes the market-surveillance regime for SERVICES (parallel to the products regime in Article 19). Article 20(1) Member States shall establish + implement procedures: (a) to verify that services comply with this Directive; (b) to follow up complaints + reports of non-compliance; (c) to verify that economic operators have taken necessary corrective action. Article 21 reporting + transparency: market surveillance authorities + service-supervisory authorities + service-providers shall make information about non-compliance + corrective action publicly available. Article 22 cross-border cooperation on services: Member States shall cooperate to share information + best practices + to handle complaints involving cross-border service provision. The Article 20-22 services regime is operationalised by national service-sector supervisory bodies (national telecoms regulator for electronic communications services, national consumer/banking authority for consumer banking services, etc.) coordinated under the EU Single Market Programme. Note: Article 23 compliance of services + Article 24-25 product procedures + Article 26 formal non-compliance complete the compliance + enforcement chapter.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.