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Details
NTRs can perform several functions, such as:
making a provision for country or network-specific cases
filling in open points identified in the national technical specification notices (NTSNs)
setting requirements to maintain technical compatibility with existing assets that do not conform to the requirements of NTSNs
Background
Under Regulation 3C of the Railways Interoperability Regulations 2011, the Secretary of State for Transport must publish a list of all national technical rules (NTRs) applying in the United Kingdom and the list must, where appropriate, specify the notified national technical rule (NNTR) that an NTR replaces.
These are the lists of NTRs for infrastructure and vehicles that replace the lists of NNTRs previously notified to the Commission by the Secretary of State.
