The NSO shall undertake to transpose European Standards (ENs) and European Standardisation deliverables (as appropriate) in accordance with clause 2.4 of the TWP and as stipulated in Article 7 in the ETSI NSO Agreement.
According to article 13.7 of the ETSI Rules of Procedures : "The NSOs shall take measures to ensure the visibility of an EN at national level, either by publication of an identical text, by publication of an endorsement sheet or by announcement in an official journal within a short time after its publication by ETSI".