ntr180-C_2022247EN.01000101-E0180
(180) According to the Directive (EU) 2016/797 on the interoperability of the rail system within the European Union each sub-system is covered by a Technical Specification of Inter-operability (TSI), which specifies the essential requirements. According to Regulation (EC) No 552/2004 on the interoperability of the European Air Traffic Management network, in case of necessity, the essential requirements are refined or complemented by implementing rules for interoperability.
Source: EUR-Lex (Cellar) · retrieved 2026-09-25 · Text as adopted (Official Journal); later amendments are not incorporated in this text.