(5) The measures issued pursuant to the fourth or preceding paragraph of this Article must be taken to the extent and for period of time essential for the removal of the emergency situation referred to in first paragraph of this Article. Article 84 (availability of publicly available services) (1) Undertakings providing publicly available telephone services via public communications networks must adopt appropriate technical and organisational measures to ensure that their activities are disrupted to the minimum possible extent in the event of the occurrence of an emergency situation. Undertakings providing publicly available telephone services must implement these measures for the entire duration of the circumstances that led to their adoption. (2) The measures referred to in the preceding paragraph must ensure the availability of publicly available telephone services in the shortest possible time. These measures must also ensure uninterrupted access to and use of emergency call numbers, in particular the single European emergency call number ‘112’, the police number ‘113’ and the single European missing children hotline number ‘116000’. Article 85 (industrial action) (1) Universal service providers and/or undertakings obliged to implement obligations pursuant to this Chapter of the Act shall, by means of an internal act, stipulate the method of uninterrupted provision of universal service or of the undertaking’s obligations under this Chapter. (2) The Agency shall monitor compliance with the obligation to adopt and implement the internal act referred to in the preceding paragraph. Article 86 (general act) The Agency shall lay down the method of implementation of the provisions of this Article in detail by means of a general act. Article 87 (supervision) The Agency shall oversee the implementation of the provisions of this Chapter. VIII. ENSURING OF COMPETITION 1. General Article 88 (independence of operation of the Agency in regard of ensuring competition) (1) In implementing tasks under this Chapter in relation to ensuring competition, the Agency may not request or receive instructions from any other state bodies. This shall not preclude it from consulting the body responsible for competition protection nor from cooperating with