When an entity finds that it does not comply with the measures required by Article 21(2), it must take all necessary, appropriate and proportionate corrective measures without undue delay. The duty is self-triggering, which is what makes it demanding: it attaches on the entity's own discovery, not on a regulator's finding, so the internal assurance work required by Article 21(2)(f) feeds straight into it. What an auditor should be able to see is the path from a known gap to corrective action within a defensible time, with proportionality applied to the urgency rather than used as a reason to defer. A finding register carrying long-overdue items with no interim mitigation is the direct evidence of failure against this paragraph.
NIS2 Directive Art.21.4 is one control. If you already hold one of the frameworks below, a reviewed crosswalk already says how much of NIS2 Directive your existing evidence covers. Hold DORA and 17 of 28 NIS2 Directive controls already carry evidence.
Each report names every control your existing framework evidences, every one it does not, the reasoning behind each claim, and the claims that were argued against and rejected. 0 were rejected on the DORA pair alone.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.