1. Each transmission, storage and/or LNG system operator shall:
(a) operate, maintain and develop under economic conditions secure, reliable and efficient transmission, storage and/or LNG facilities to secure an open market, with due regard to the environment, ensure adequate means to meet service obligations;
(b) refrain from discriminating between system users or classes of system users, particularly in favour of its related undertakings;
(c) provide any other transmission system operator, any other storage system operator, any other LNG system operator and/or any distribution system operator, sufficient informa? tion to ensure that the transport and storage of natural gas may take place in a manner compatible with the secure and efficient operation of the interconnected system; and
(d) provide system users with the information they need for effi?
cient access to the system.
2. Each transmission system operator shall build sufficient cross-border capacity to integrate European transmission infra? structure accommodating all economically reasonable and tech? nically feasible demands for capacity and taking into account security of gas supply.
3. Rules adopted by transmission system operators for balanc? ing the gas transmission system shall be objective, transparent and non-discriminatory, including rules for the charging of system users of their networks for energy imbalance. Terms and condi? tions, including rules and tariffs, for the provision of such services by transmission system operators shall be established pursuant to a methodology compatible with Article 41(6) in a non- discriminatory and cost-reflective way and shall be published.
4. The regulatory authorities where Member States have so provided or Member States may require transmission system operators to comply with minimum standards for the mainte? nance and development of the transmission system, including interconnection capacity.
5. Transmission system operators shall procure the energy they use for the carrying out of their functions according to trans? parent, non-discriminatory and market based procedures.
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