3. Cloud computing that enables access to a scalable and elastic pool of shareable computing resources m) A relevant public authority means an authority in the field of cyber security Section 3 Public authorities and legal or natural persons that are bound by obligations in the cyber security field are as follows: a) An electronic communication service provider and an entity operating an electronic communications network1), unless they are public authorities or legal or natural persons specified in letter b) b) A public authority or legal or natural person administrating an important network, unless they are the operator or the administrator of a communication system according to letter d) c) An operator and an administrator of a critical information infrastructure information system d) An operator and an administrator of a critical information infrastructure communication system e) An operator and an administrator of an important information system f) An operator and an administrator of an information system of essential service, unless they are the operator or the administrator specified in letters c) or d) g) An operator of an essential service, unless they are the operator or the administrator specified in letter f) h) A digital service provider Section 3a Representative of a digital service provider (1) A digital service provider that provides such service in the Czech Republic, does not have a registered office in the European Union and did not appoint a representative in another Member State of the European Union (hereinafter “another Member State”), is obliged to appoint a representative in the Czech Republic. A representative of a digital service provider is a person which is established in the Czech Republic and which is authorised to represent a digital service provider in relation to the obligations under this Act on the basis of power of attorney. (2) When a digital service provider has a registered office outside the European Union and has appointed a representative in the Czech Republic, the provider is considered to be established in the Czech Republic and is subject to the obligations under this Act. (3) When a digital service provider has a registered office in the Czech Republic or has an appointed representative here but the electronic communication networks and information systems this entity uses are located in another Member State, the Agency shall collaborate with the relevant public authority of the concerned Member State when performing its competences.