This Regulation shall apply to all entry points and all exit points of gas transmission networks with the exception of Chapters III, V, VI, Article 28, Article 31(2) and (3) and Chapter IX which shall apply only to interconnection points. Chapters III, V, VI, Article 28 and Chapter IX shall apply to F1entry points from or exit points to other countries that are not member States, or both, where the national regulatory authority takes a decision to apply Regulation (EU) 2017/459 at those points.

If a transmission system operator is regulated by both national regulatory authorities, where relevant they must cooperate with each other regarding the regulation of that transmission system operator.

If a transmission system operator is regulated by a national regulatory authority and a non-UK regulatory authority, where relevant the national regulatory authority must endeavour to cooperate with the non-UK regulatory authority regarding the regulation of that transmission system operator.

The interconnection points within the scope of this Regulation are those where transmission system operators or network users carry out functions or activities that are regulated by a national regulatory authority.

Paragraph 5 applies so that obligations that apply to transmission system operators at an interconnection point apply to a transmission system operator that is adjacent to a non-UK TSO at an interconnection point.

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