1. European Union (2012/88/EU), Commission Decision of 25 January 2012 on the technical specification for interoperability relating to the control-command and signalling subsystems of the trans-European rail system.
2. European Union (2012/696/EU), Commission Decision of 6 November 2012 amending Decision 2012/88/EU on the technical specifications for interoperability relating to the control-command and signalling subsystems of the trans-European rail system (2012/696/EU).
3. IEC 62290-1, Railway Applications – Urban Guided Transport Management and Command/Control Systems – Part 1: System Principles and Fundamental Concepts.
4. IEC 62290-2, Railway Applications – Urban Guided Transport Management and Command/Control Systems – Part 2: Functional Requirement Specification, IEC 62290-2.
5. IEEE 1474.1, IEEE standard for Communications-Based Train Control (CBTC) Performance and Functional Requirements, 2004 (R2009).