4. The Commission and the Board shall assess whether the codes of conduct meet the aims specified in paragraphs 1 and 3, and shall regularly monitor and evaluate the achievement of their objectives, having regard to the key performance indicators that they might contain. They shall publish their conclusions.
The Commission and the Board shall also encourage and facilitate regular review and adaptation of the codes of conduct.
In the case of systematic failure to comply with the codes of conduct, the Commission and the Board may invite the signatories to the codes of conduct to take the necessary action.