congestion — a situation in which an interconnection linking national transmission networks, cannot accommodate all physical flows resulting from international trade requested by market participants, because of a lack of capacity of the interconnectors and/or the national transmission systems concerned (c)

cross-border flow — a physical flow of electricity on a transmission network of a Member State that results from the impact of the activity of producers and/or consumers outside of that Member State on its transmission network. If transmission networks of two or more Member States form part, entirely or partly, of a single control block, for the purpose of the inter-transmission system operator (TSO) compensation mechanism referred to in Article 3 only, the control block as a whole shall be considered as forming part of the transmission network of one of the Member States concerned, in order to avoid flows within control blocks being considered as cross-border flows and giving rise to compensation payments under Article 3. The regulatory authorities of the Member States concerned may decide which of the Member States concerned shall be the one of which the control block as a whole shall be considered to form part of (b)

interconnector — a transmission line which crosses or spans a border between Member States and which connects the national transmission systems of the Member States; art_2__para_1__item_1

new interconnector — an interconnector not completed by the date of entry into force of this Regulation (g)

regulatory authorities — the regulatory authorities referred to in Article 23(1) of Directive 2003/54/EC (a)