AbstractAs part of the European Commission’s ‘Banking Package’, introducing a series of amendments to the key legal sources of EU banking regulation, a comprehensive proposal for the treatment of third country branches of credit institutions (i.e., branches of institutions licensed by non-EU jurisdictions seeking authorisation in an EU Member State) has been presented. If and when ultimately adopted, this new framework will, for the first time, harmonise the applicable authorisation procedures and substantive conditions for authorisation hitherto left exclusively to the discretion of EU Member States. Under the new regime, the equivalence of third country regulatory and supervisory approaches with EU banking regulation will play a role, albeit a limited one. While taking up, and refining, approaches that have been present in a range of Member States for some time already, the new framework will require others to fundamentally change their existing regimes. The new amendments will be of particular relevance for the future regulatory relationship between the United Kingdom and the European Union, since a bespoke arrangement for continuing access of UK financial intermediaries to the EU markets has not been achieved, and UK credit institutions wishing to continue to operate within the EU other than through legally separate and independently capitalised subsidiaries have to rely on authorisations as third country branches. Against this backdrop, the present paper presents a functional analysis of the incoming regime in light of experiences made with regard to the existing landscape of diverging national laws.