- allocability
means the discretionary combination of any entry capacity with any exit capacity or vice versa;
- allowed revenue
means the sum of transmission service revenue and non-transmission service revenue for the provision of services by the transmission system operator for a specific time period within a given regulatory period which such transmission system operator is entitled to obtain under a non-price cap regime and which is set in accordance with Article 78(7), point (a), of Directive (EU) 2024/1788;
- ancillary services
means ancillary services as defined in Article 2, point (36), of Directive (EU) 2024/1788;
- available capacity
means the part of the technical capacity that is not allocated and that is still available to the system at a particular moment;
- balancing period
means the period within which the off-take of an amount of natural gas or hydrogen, expressed in units of energy, is to be offset by every network user by means of the injection of the same amount of natural gas or hydrogen in accordance with the network code;
- balancing zone
means balancing zone as defined in Article 2, point (58), of Directive (EU) 2024/1788;
- capacity
means the maximum flow, expressed in normal cubic meters per time unit or in energy unit per time unit, to which the network user is entitled in accordance with the provisions of the transport contract;
- conditional capacity
means firm capacity that entails transparent and predefined conditions for either providing access from and to the virtual trading point or limited allocability;
- congestion management
means management of the capacity portfolio of the transmission system operator with a view to optimal and maximum use of the technical capacity and the timely detection of future congestion and saturation points;
- contracted capacity
means capacity that has been allocated to a network user by means of a transport contract;
- contractual congestion
means a situation where the level of firm capacity demand exceeds the technical capacity;
- control
means control as defined in Article 2, point (55), of Directive (EU) 2024/1788;
- customer
means customer as defined in Article 2, point (47), of Directive (EU) 2024/1788;
- deliverability
means the rate at which the storage facility user is entitled to withdraw natural gas or hydrogen from the natural gas storage facility or hydrogen storage facility;
- distribution
means distribution as defined in Article 2, point (19), of Directive (EU) 2024/1788;
- distribution system operator
means distribution system operator as defined in Article 2, point (20), of Directive (EU) 2024/1788;
- energy efficiency first
means energy efficiency first as defined in Article 2, point (18), of Regulation (EU) 2018/1999 of the European Parliament and of the Council;
- entry point
means entry point as defined in Article 2, point (61), of Directive (EU) 2024/1788;
- entry-exit system
means entry-exit system as defined in Article 2, point (57), of Directive (EU) 2024/1788;
- exit point
means exit point as defined in Article 2, point (62), of Directive (EU) 2024/1788;
- final customer
means final customer as defined in Article 2, point (50), of Directive (EU) 2024/1788;
- firm capacity
means natural gas and hydrogen transmission and distribution capacity contractually guaranteed as uninterruptible by the transmission system operator or, where applicable, the distribution system operator, or the hydrogen network operator;
- hydrogen distribution network
means hydrogen distribution network as defined in Article 2, point (24), of Directive (EU) 2024/1788;
- hydrogen distribution network operator
means hydrogen distribution network operator as defined in Article 2, point (27), of Directive (EU) 2024/1788;
- hydrogen interconnector
means hydrogen interconnector as defined in Article 2, point (40), of Directive (EU) 2024/1788;
- hydrogen network
means hydrogen network as defined in Article 2, point (21), of Directive (EU) 2024/1788;
- hydrogen network operator
means hydrogen network operator as defined in Article 2, point (25), of Directive (EU) 2024/1788;
- hydrogen quality
means hydrogen quality as defined in Article 2, point (10), of Directive (EU) 2024/1788;
- hydrogen storage facility
means a hydrogen storage facility as defined in Article 2, point (5), of Directive (EU) 2024/1788;
- hydrogen storage operator
means a hydrogen storage operator as defined in Article 2, point (6), of Directive (EU) 2024/1788;
- hydrogen system
means hydrogen system as defined in Article 2, point (4), of Directive (EU) 2024/1788;
- hydrogen terminal
means hydrogen terminal as defined in Article 2, point (8), of Gas Directive (EU) 2024/1788;
- hydrogen terminal operator
means hydrogen terminal operator as defined in Article 2, point (9), of Directive (EU) 2024/1788;
- hydrogen transmission network
means hydrogen transmission network as defined in Article 2, point (23), of Directive (EU) 2024/1788;
- hydrogen transmission network operator
means hydrogen transmission network operator as defined in Article 2, point (26), of Directive (EU) 2024/1788;
- hydrogen transport
means hydrogen transport as defined in Article 2, point (22), of Directive (EU) 2024/1788;
- injectability
means the rate at which the storage facility user is entitled to inject natural gas or hydrogen into the natural gas storage facility or hydrogen storage facility;
- interconnection point
means interconnection point as defined in Article 2, point (63), of Directive (EU) 2024/1788;
- interconnector
means interconnector as defined in Article 2, point (39), of Gas Directive (EU) 2024/1788;
- interoperability
means interoperability as defined in Article 2, point (71), of Directive (EU) 2024/1788;
- interruptible capacity
means natural gas or hydrogen transmission capacity that may be interrupted by the transmission system operator or, where applicable, the distribution system operator, or the hydrogen network operator, in accordance with the conditions stipulated in the transport contract;
- interruptible services
means services offered by the transmission system operator or, where applicable, the distribution system operator, or the hydrogen network operator in relation to interruptible capacity;
- long-term contract
means long-term contract as defined in Article 2, point (56), of Directive (EU) 2024/1788;
- long-term services
means services offered by the transmission system operator or, where applicable, the distribution system operator, or the hydrogen network operator with a duration of one year or more;
- low-carbon gas
means low-carbon gas as defined in Article 2, point (12), of Directive (EU) 2024/1788;
- low-carbon hydrogen
means low-carbon hydrogen as defined in Article 2, point (11), of Directive (EU) 2024/1788;
- market participant
means market participant as defined in Article 2, point (65), of Directive (EU) 2024/1788;
- natural gas
means natural gas as defined in Article 2, point (1), of Directive (EU) 2024/1788;
- natural gas storage facility
means natural gas storage facility as defined in Article 2, point (31), of Directive (EU) 2024/1788;
- natural gas storage system operator
means natural gas storage system operator as defined in Article 2, point (32), of Directive (EU) 2024/1788;
- natural gas system
means natural gas system as defined in Article 2, point (3), of Directive (EU) 2024/1788;
- network user
means network user as defined in Article 2, point (60), of Directive (EU) 2024/1788;
- new infrastructure
means an infrastructure not completed by 4 August 2003;
- nomination
means the reporting by the network user to the transmission system operator of the actual flow that the network user wishes to inject into or withdraw from the system, prior to such an injection or withdrawal;
- physical congestion
means a situation where the level of demand for actual deliveries exceeds the technical capacity at a particular moment;
- primary market
means the market of the capacity traded directly by the transmission system operator or, where applicable, the distribution system operator, or the hydrogen transmission network operator;
- re-nomination
means the reporting of a corrected nomination, subsequent to a nomination;
- regulatory asset base
means the network assets of a transmission system operator, distribution system operator, hydrogen transmission network operator and hydrogen distribution network operator used for the provision of regulated network services that are taken into account when calculating network-related service revenue;
- renewable gas
means renewable gas as defined in Article 2, point (2), of Directive (EU) 2024/1788;
- repurposing
means repurposing as defined in Article 2, point (18), of Regulation (EU) 2022/869;
- secondary market
means the market of the capacity traded otherwise than on the primary market;
- short-term services
means services offered by the transmission system operator or, where applicable, the distribution system operator, or the or hydrogen network operator with a duration of less than one year;
- space
means the volume of natural gas or hydrogen which a user of a storage facility is entitled to use for the storage of natural gas or hydrogen;
- storage capacity
means any combination of space, injectability and deliverability;
- supply
means supply as defined in Article 2, point (28), of Directive (EU) 2024/1788;
- system
means system as defined in Article 2, point (35), of Directive (EU) 2024/1788;
- system integrity
means any situation in which the pressure and the quality of the natural gas natural gas or hydrogen remain within the minimum and maximum limits, so that the transport of natural gas or hydrogen is guaranteed from a technical standpoint;
- system user
means system user as defined in Article 2, point (46), of Directive (EU) 2024/1788;
- target revenue
means the sum of expected transmission service revenue calculated in accordance with the principles set out in Article 17(1) and expected non-transmission service revenue for the provision of services by the transmission system operator for a specific time period within a given regulatory period under a price cap regime;
- technical capacity
means the maximum firm capacity that can be offered to the network users, taking account of system integrity and the operational requirements of the transmission system operator or, where applicable, the distribution system operator, or the hydrogen network operator;
- transmission
means transmission as defined in Article 2, point (17), of Directive (EU) 2024/1788;
- transmission system operator
means transmission system operator as defined in Article 2, point (18), of Directive (EU) 2024/1788;
- transport contract
means a contract which the transmission system operator or hydrogen network operator has concluded with a network user with a view to carrying out transport services for natural gas or hydrogen;
- unused capacity
means firm capacity which a network user has acquired under a transport contract but which that user has not nominated by the deadline specified in the contract;
- upstream pipeline network
means upstream pipeline network as defined in Article 2, point (16), of Directive (EU) 2024/1788;
- vertically integrated undertaking
means vertically integrated undertaking as defined in Article 2, point (43), of Directive (EU) 2024/1788.
- virtual interconnection point
means virtual interconnection point as defined in Article 2, point (64), of Directive (EU) 2024/1788;
- virtual trading point
means virtual trading point as defined in Article 2, point (59), of Directive (EU) 2024/1788;
- wholesale customer
means wholesale customer as defined in Article 2, point (51), of Directive (EU) 2024/1788;