7. The Commission and the Agencies shall take the necessary and appropriate measures to monitor and identify, at an early stage, any potential divergence between controlled vocabularies. If a divergence between controlled vocabularies is identified, the Agencies concerned shall cooperate to resolve it or, where the divergence is justified, explain the underlying reasons. Where the Agencies concerned are not able to resolve the divergence, they shall draw up a joint report and present it to the Commission. The report shall clearly outline the reasons for the divergence, clarify any underlying technical issue and make a proposal to resolve the divergence.