[360] 3 14. Amendment of designation as operator of essential services by addition of sector, subsector or essential service in respect of which a person is designated 15. Amendment of designation as operator of essential services by cancellation of category of sector or subsector or essential service in respect of which a person is designated 16. Register of Operators of Essential Services, Combined Operators Register 17. Security requirements in respect of operators of essential services 18. Incident notification by operators of essential services PART 5 Digital Service Providers 19. Definition 20. Relevant digital service provider 21. Security measures to be taken by relevant digital service providers 22. Incident notification by a relevant digital service provider 23. Co-operation and assistance in respect of relevant digital service providers whose network and information systems are not in State 24. Co-operation in respect of digital service providers whose main establishment or designated representative not in State but whose network and information systems are in State PART 6 GUIDELINES 25. Guidelines PART 7 VOLUNTARY NOTIFICATION 26. Voluntary Notification PART 8 IMPLEMENTATION AND ENFORCEMENT 27. Security assessment 28. Appointment of authorised officers 29. Powers of authorised officers