9.—(1) Where for the purposes of paragraph 7 the person giving or serving notice is not able to ascertain a proper address in relation to a UK operator, a relevant address may instead be treated as the proper address.
(2) For that purpose, “relevant address” means an address derived from information supplied to the regulator by Eurocontrol (or any other organisation) at the request of the European Commission(1).
Article 18b of the EU ETS Directive enables the Commission to request the assistance of Eurocontrol (or another relevant organisation) in preparing its list of operators; Eurocontrol (the European Organisation for the Safety of Air Navigation) is an intergovernmental organisation of 38 States and the European Union.