Where, in the course of an investigation into systematic non-compliance, a gatekeeper offers commitments to the Commission, the latter should be able to adopt a decision making these commitments binding on the gatekeeper concerned, where it finds that the commitments ensure effective compliance with the obligations set out in this Regulation. That decision should also find that there are no longer grounds for action by the Commission as regards the systematic non-compliance under investigation. In assessing whether the commitments offered by the gatekeeper are sufficient to ensure effective compliance with the obligations under this Regulation, the Commission should be allowed to take into account tests undertaken by the gatekeeper to demonstrate the effectiveness of the offered commitments in practice. The Commission should verify that the commitments decision is fully respected and reaches its objectives, and should be entitled to reopen the decision if it finds that the commitments are not effective.