centres and other CERT workplaces, and with public authorities and legal or natural persons that operate in selected areas of the protection of classified information h) Ensures international cooperation in the field of cyber security and in selected areas of the protection of classified information i) Negotiates and concludes contracts in the field of cyber security and in selected areas of the protection of classified information j) Ensures prevention, education and methodological support in the field of cyber security and in selected areas of the protection of classified information k) Ensures research and development in the field of cyber security and in selected areas of the protection of classified information l) Concludes a public-law contract with the operator of the national CERT m) Submits to the Ministry of Interior according to the Crisis Act a proposal of critical infrastructure elements in the subfield of communication and information systems in the field of cyber security, the operator of which is a state organisation unit, n) Defines critical infrastructure elements in the subfield of communication and information systems in the field of cyber security according to the Crisis Act, unless they are elements specified in letter m) o) Checks the up-to-datedness of the determination of critical infrastructure elements according to letters m) and n) every 2 years p) Determines the operator of an essential service and the information system of essential service q) Processes and submits to the government for approval a National Strategy of Cyber Security13) and an Action Plan to fulfil the Strategy, and updates the Strategy at least every 5 years r) Is the single point of contact to ensure international cooperation in the field of cyber security within the European Union s) Is the competent authority in the Czech Republic and fulfils information obligations towards the European Commission and the Cooperation Group according to relevant legal regulations of the European Union14) t) Informs the public of a cyber security incident according to Section 12, paragraph 3 u) Performs analyses and monitoring of cyber security threats and risks v) Exercises competence in the field of the public regulated service of the European satellite navigation programme Galileo w) Publishes an Official Journal of the Agency, which is posted on its website x) Performs other tasks in the field of cyber security set out under this Act and in specifically selected areas of the protection of classified information according to the Act on the Protection of Classified Information and on Security Eligibility. Section 22a The identification of an operator of essential service and an information system of essential service