1. Without undue delay and in any event by 8 September 2025, each Union entity shall, under the oversight of its highest level of management, take appropriate and proportionate technical, operational and organisational measures to manage the cybersecurity risks identified under the Framework, and to prevent or minimise the impact of incidents. Taking into account the state of the art and, where applicable, relevant European and international standards, those measures shall ensure a level of security of network and information systems across the entirety of the ICT environment commensurate to the cybersecurity risks posed. When assessing the proportionality of those measures, due account shall be taken of the degree of the Union entity’s exposure to cybersecurity risks, its size and the likelihood of occurrence of incidents and their severity, including their societal, economic and interinstitutional impact.