In addition, the following definitions shall apply:

1. (1)

   ‘defence service provider’ means a legal entity with a legal or contractual obligation to provide a service contributing to one or several measures of the system defence plan;

2. (2)

   ‘restoration service provider’ means a legal entity with a legal or contractual obligation to provide a service contributing to one or several measures of the restoration plan;

3. (3)

   ‘high priority significant grid user’ means the significant grid user for which special conditions apply for disconnection and re-energisation;

4. (4)

   ‘netted demand’ means the netted value of active power seen from a given point of the system, computed as (load — generation), generally expressed in kilowatts (kW) or megawatts (MW), at a given instant or averaged over any designated interval of time;

5. (5)

   ‘restoration plan’ means all technical and organisational measures necessary for the restoration of the system back to normal state;

6. (6)

   ‘re-energisation’ means reconnecting generation and load to energise the parts of the system that have been disconnected;

7. (7)

   ‘top-down re-energisation strategy’ means a strategy that requires the assistance of other TSOs to re-energise parts of the system of a TSO;

8. (8)

   ‘bottom-up re-energisation strategy’ means a strategy where part of the system of a TSO can be re-energised without the assistance from other TSOs;

9. (9)

   ‘resynchronisation’ means synchronising and connecting again two synchronised regions at the resynchronisation point;

10. (10)

    ‘frequency leader’ means the TSO appointed and responsible for managing the system frequency within a synchronised region or a synchronous area in order to restore system frequency back to the nominal frequency;

11. (11)

    ‘synchronised region’ means the fraction of a synchronous area covered by interconnected TSOs with a common system frequency and which is not synchronised with the rest of the synchronous area;

12. (12)

    ‘resynchronisation leader’ means the TSO appointed and responsible for the resynchronisation of two synchronised regions;

13. (13)

    ‘resynchronisation point’ means the device used to connect two synchronised regions, usually a circuit breaker.

14. (15)

    F6“SGU” or “significant grid user” means an electricity grid user of a kind specified in Article 2(1) of Commission Regulation (EU) 2017/1485.