The Case study is based on Iida vs. Ulm C‑40/11
In this case the CJEU elaborated on the relevance of the purpose of a EU Directive and its congruence with a specific situation at stake for the question of sufficient connection with European Union law - and subsequently applicability of the Charter.
Free Movement Directive 2004/38/EC
Long-term residents Directive 2003/109/EC
Yoshikazu Iida v. Stadt Ulm (City of Ulm)
Article 51 Field of application