(4)Several Memoranda of Understanding on exchange of information have been signed between Union supervisors and insurance departments of the US states. Since the adoption of Delegated Decision (EU) 2015/2290, a further eleven US states have become signatories to the Multilateral Memorandum of Understanding of the International Association of Insurance Supervisors. Confidentiality rules based on NAIC model laws, are incorporated into state legislation and require state supervisors and their staff to maintain the confidentiality of information received from foreign supervisors.