http://www.legislation.gov.uk/eur/2014/312/chapter/IX/adoptedCommission Regulation (EU) No 312/2014 of 26 March 2014 establishing a Network Code on Gas Balancing of Transmission Networks (Text with EEA relevance)Commission Regulation (EU) No 312/2014Commission Regulation (EU) No 312/2014 of 26 March 2014 establishing a Network Code on Gas Balancing of Transmission Networks (Text with EEA relevance)2020-12-10King's Printer of Acts of Parliamenthttps://webarchive.nationalarchives.gov.uk/eu-exit/https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32014R0312texttext/xmlen CHAPTER IX <Strong>LINEPACK FLEXIBILITY SERVICE</Strong> General provisions Article 43 1 A transmission system operator may offer the provision of a linepack flexibility service to network users after the approval of the related terms and conditions by the national regulatory authority. 2 The terms and conditions applicable to a linepack flexibility service shall be consistent with the responsibility of a network user to balance its inputs and off-takes over the gas day. 3 The linepack flexibility service shall be limited to the level of linepack flexibility available in the transmission network and deemed not required for carrying out its function of transmission according to the concerned transmission system operator’s evaluation. 4 Gas delivered to and off-taken from the transmission network by network users under this service shall be taken into account for the purpose of calculation of their daily imbalance quantity. 5 The neutrality mechanism set out in Chapter VII shall not apply to the linepack flexibility service unless otherwise decided by the national regulatory authority. 6 Network users shall notify the transmission system operator concerned of the use of the linepack flexibility service by submitting nominations and re-nominations. 7 The transmission system operator may refrain from requiring the network users to submit nominations and re-nominations referred to in paragraph 6, where the absence of such a notification does not undermine the development of the short term wholesale gas market and the transmission system operator has sufficient information to provide an accurate allocation of the use of a linepack flexibility service the following gas day. Conditions for provision of linepack flexibility service Article 44 1 Linepack flexibility service can only be provided once all the following criteria are met: a the transmission system operator shall not need to enter into any contracts with any other infrastructure provider, such as storage system operator or LNG system operator, for the purpose of provision of a linepack flexibility service; b the revenues generated by the transmission system operator from the provision of a linepack flexibility service shall at least be equal to the costs incurred or to be incurred in providing this service; c the linepack flexibility service shall be offered on a transparent and non-discriminatory basis and can be offered using competitive mechanisms; d the transmission system operator shall not charge, either directly or indirectly, a network user for any costs incurred by the provision of a linepack flexibility service, should this network user not contract for it; and e the provision of a linepack flexibility service shall not have a detrimental impact on cross-border trade. 2 The transmission system operator shall prioritise the reduction of within day obligations over the provision of a linepack flexibility service.