Definitions

Balancing service agreement⁽⁴⁾ means the standardized agreement, which may be concluded by a network user with any TSO in the common balancing zone, in order to provide balancing services;
Balancing portfolio⁽⁴⁾ means the information gathered by the TSO on the network user's inputs and off-takes in transmission systems of the common balancing zone at the relevant entry and exit points;
Balance responsibility⁽⁴⁾ means the responsibility of the network user for the portfolio imbalance and the settlement of imbalances;
Fuel gas⁽³⁾ - quantity of the natural gas required for the operation of natural gas compression units to ensure the injection of natural gas into the storage facility;
Flexible delivery agreement⁽³⁾ means type of gas sale - purchase agreement that allows gas to be supplied in accordance with network user's demand with flexibility to adjust delivery schedule;
Energy identification code (hereinafter - the EIC)⁽¹⁾ means the identification code assigned to market participants in accordance of the Energy Identification Coding scheme;
Fixed delivery agreement⁽¹⁾ means type of gas sale - purchase agreement where gas is supplied in accordance to in advance arranged delivery schedule;
Gas month⁽¹⁾ means a period beginning on the first day, at 5:00 UTC of each calendar month and ending on the first day, at 5:00 UTC of the next calendar month from 4:00 to 4:00 UTC when daylight saving is applied;
Gas quarter⁽¹⁾ - the period from 5:00 UTC on 1 January to 5:00 UTC on 1 April (Q2); the period from 5:00 UTC on 1 April to 5:00 UTC on 1 July (Q3); the period from 5:00 UTC on 1 July to 5:00 UTC on 1 October (Q4); the period from 5:00 UTC on 1 October to 5:00 UTC on 1 January (Q1) in the winter time, from 4:00 to 4:00 UTC when daylight saving is applied;
Gas year⁽¹⁾ means a period beginning on 1 October at 5:00 UTC of each year and ending on 1 October at 5:00 UTC of the following year in the winter time, from 4:00 to 4:00 UTC when daylight saving is applied;
Entry capacity⁽¹⁾ means the available transmission system capacity at a given entry point;
Entry point⁽¹⁾ means a physical or virtual point where gas is delivered to the transmission system, and where the transmission of gas through the transmission system begin;
Exit capacity⁽¹⁾ means the available transmission system capacity at a given exit point;
Exit point⁽¹⁾ means a physical point where the gas transmission ends and gas is supplied to the adjacent transmission system, distribution system or to the consumption site directly connected to the transmission system. If the distribution system is connected to the transmission system in several points of the transmission system, then all connection points shall be considered as a single exit point;
Capacity product⁽³⁾ – the storage service offered by the system operator;
Capacity booking⁽¹⁾ means the procedure of online booking of transmission capacity using the standard communication protocol;
Capacity booking application⁽¹⁾ means a request which a network user submits to the TSO regarding the booking of capacity using the standard communication protocol;
Stock⁽³⁾ – quantity of the natural gas stored in the storage facility under a storage service contract;
Storage cycle⁽³⁾ – quantity of the natural gas stored in the storage facility under a storage service contract;
Unused storage capacity⁽³⁾ – the part of the technical storage capacity booked by the system users and not used for the storage of stocks;
Available storage capacity⁽³⁾ – the part of the technical capacity of the storage that has not been allocated and is available to the system users for booking, taking into account the integrity of the storage facility and the requirements for the storage management; and the procedures for booking storage capacity products specified in Chapter IV of Regulations Regarding the Use of the Inčukalns Underground Gas Storage Facility of 01.10.2022;
Technical storage capacity⁽³⁾ – the ability of the storage facility to ensure the maximum quantity of natural gas stored in the storage facility which the system operator can offer to the system users within storage cycle;
Long Term Use It Or Lose It⁽¹⁾ (hereinafter - UIOLI) means a procedure of reallocation of transmission system capacity systematically booked but not used in case of the request of other network users for the firm capacity;
Reverse-flow capacity⁽³⁾ – the natural gas transmission system capacity for the direction opposite to the flow of the actual technological mode of the storage facility available to the system users for booking;
Imbalance⁽¹⁾means a situation where allocations into the transmission system by a network user differs from off-takes from the transmission system by that network user during the gas day;
Nomination⁽²⁾ - a prior notification of the system user to the transmission system operator of the quantity of natural gasdetermined in kilowatt hours per day (kWh/d) which the system user is willing to inject into or off-take from the transmission system;
Additional capacity⁽¹⁾ means capacity of entry or exit point made available in the event of congestion management, or in the event of submission of nominations capacity in excess of the network user's booked capacity;
Interruption⁽¹⁾ means limitation of network user's rights to use the transmission system, i.e. the limitation of the right to transmit gas by using booked firm or interruptible capacity;
Transmission service agreement⁽¹⁾ means the agreement concluded between the TSO and the network user, which entitles the network user to use the transmission systems of the common balancing zone and ensures the performance of the transmission service to the network user within the common balancing zone;
Allocation⁽²⁾ - the quantity of natural gas injected into at a specific entry point or off-taken at a specific exit point which has been allocated to the system user of the transmission system operator and expressed in kilowatt hours to determine imbalance quantity of the gas day D;
Reverse-flow capacity⁽³⁾ – the natural gas transmission system capacity for the direction opposite to the flow of the actual technological mode of the storage facility available to the system users for booking;
First-Come-First-Served principle - (hereinafter - FCFS principle)⁽¹⁾ means the capacity allocation method when capacity is allocated primarily to the network users who have applied for capacity booking at the earliest;
Re-nomination⁽¹⁾ means the subsequent reporting of a changed nomination;
Standard information exchange user guide⁽¹⁾ means a document regarding details and principles of information exchange between network user and TSO available on the TSO website;
Standard communication protocol⁽¹⁾ means the format of information exchange between the TSO and the network user according to EDIG@S standard;
Trade notification⁽³⁾ – the system user’s notification to the system operator in accordance with the standard communication protocol regarding the transfer of the quantity of natural gas to the natural gas transmission system user or receipt from the natural gas transmission system user;
Storage service contract⁽³⁾ – a contract concluded between the system operator and the system user on the basis of which the system operator provides a storage service to the system user;
Common balancing zone⁽¹⁾ means the common Estonian and Latvian balancing zone in which an imbalance position for each network user is determined and where this Regulation apply;
Virtual trading point⁽⁴⁾ means a place which is not physically specified between the entry and exit points of the common balancing zone and at which gas injected into the common balancing zone is exchanged between the network users;
Title product⁽⁴⁾ means any product for the sale and purchase of gas that involves an exchange of gas at the virtual trading point of the common balancing zone.

⁽¹⁾ Sabiedrisko pakalpojumu regulēšanas komisijas padomes lēmums Nr. 120 Rīgā 2022. gada 4. augustā (prot. Nr. 30, 3. p.) “Par Vienoto dabasgāzes pārvades sistēmas lietošanas noteikumu saskaņošanu”.

⁽²⁾Sabiedrisko pakalpojumu regulēšanas komisijas padomes lēmums Nr. 1/16 Rīgā 2017.gada 13.aprīlī (prot. Nr.15, 4.p.) “Dabasgāzes pārvades sistēmas lietošanas noteikumi”.

⁽³⁾Sabiedrisko pakalpojumu regulēšanas komisijas padomes lēmums Nr. 1/14 Rīgā 2020. gada 1. oktobrī (prot. Nr. 41, 3. p.) “Inčukalna pazemes gāzes krātuves lietošanas noteikumi”.

⁽⁴⁾Sabiedrisko pakalpojumu regulēšanas komisijas padomes lēmums Nr. 186 Rīgā 2022. gada 29. septembrī (prot. Nr. 41, 2. p.) “Par vienotās dabasgāzes pārvades ieejas-izejas sistēmas balansēšanas noteikumu saskaņošanu”.