National Safety Authority

(a) the national body entrusted with the tasks regarding railway safety in accordance with this Directive; (b) any body entrusted by several Member States with the tasks referred to in point (a) in order to ensure a unified safety regime; (c) any body entrusted by a Member State and a third country with the tasks referred to in point (a) in order to ensure a unified safety regime, provided that the Union has concluded an agreement to this effect with the third country concerned or that that Member State has concluded such agreement in accordance with an empowerment granted by the Union to that effect; (Article 3(7) of Directive EU/2016/798).