Rail interoperability frequently asked questions about NNTR's
| Publisher: | Department for Transport |
| Publication type: | FAQ |
| Published date: | 21 July 2011 |
| Mode/topic: | Rail, Rail interoperability |
What is an NNTR?
NNTR stands for Notified National Technical Rule. An NNTR is a technical specification applied by the Member State in order to ensure that an “essential requirement” (as defined in Schedules 5 and 6 of the regulations) will be met where a TSI does not yet exist, or the relevant TSI is silent on a particular matter, or contains an Open Point, or a derogation has been granted in relation to a TSI. The Member State must notify the European Commission of all NNTRs.
Generally, NNTRs are Railway Group Standards (RGS) – or parts of those standards – which have been deemed to be most appropriate. But it is quite possible to devise and notify other standards – see ‘Can NNTRs be changed?’
Can NNTRs be changed? And if so, how?
Yes they can. For example, a new NNTR may be needed to cover an area not previously addressed, or a Contracting Entity may want to meet an Essential Requirement, or to assess conformance, in a way other than allowed for in the existing NNTR.
NNTRs are notified to the Commission by DfT, on the recommendation of RSSB, who will take into account the views of the ISCC. Proposals for changes, or for new rules, should therefore be made to RSSB in the first instance.
Can we use an NNTR instead of a TSI?
No, not if a TSI exists and governs the matter in question.
