Research Article

The Impact of EU Law on National Legal Frameworks

Volume: 13 Number: 2 December 23, 2025
EN

The Impact of EU Law on National Legal Frameworks

Abstract

The presented paper focuses on the complex correlation between European Union and the national legal systems of its member states. It examines the fundamental principles that underpin this relationship, and considers how they are playing out in different national contexts. The due emphasis on the EU Law primacy principle in cases of conflicts with national laws, which has far reaching legal and political ramifications in a multi-level governance system, including its challenges to national sovereignty and the impact they create legally and politically. The presented study examines how national constitutional courts in member states have differed in their interpretation of this principle and highlights the delicate balance they registered between setting EU obligations on one hand and safeguarding national constitutional identities on the other. The paper explains the idea of direct effect and the distinctions between vertical and horizontal direct effect as well as their evolution over time and constraints. The debates also underscore the fragmented nature of domestic courts in implementing direct effect, resulting in disparate measures and outcomes for individuals trying to rely on EU rights. The paper also assesses the implications of both of these systemic principles, covered in European treatment as the proportionality principle. The analysis highlights the continued negotiation of power between supranational and national legal systems, and the importance of national courts in interpreting both sets of laws, as well as in their application on the ground.

Keywords

EU Law, Primacy Principle, Direct Effect, Proportionality Principle, CJEU

References

  1. Arndt, Felix. “The German Federal Constitutional Court At the Intersection of National and European Law: Two Recent Decisions”. German Law Journal 2/11 (2001), E4. https://doi.org/10.1017/S2071832200003655
  2. Bobek, Michal. “The Effects of EU Law in the National Legal Systems”. European Union Law. ed. Catherine Bernard - Steve Peers. 154-190. Oxford: Oxford University Press, 2020.
  3. Bobek, Michal. “Thou Shalt Have Two Masters: The Application of European Law by Administrative Authorities in the New Member States”. Review of European and Administrative Law 1/1 (2008), 51-63. https://ssrn.com/abstract=1555674
  4. CJEU, Court of Justice of the European Union, D. Case 6/60 (16 December 1960). https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:61960CJ0006
  5. CJEU, Court of Justice of the European Union, D. Case 9/65 (14 December, 1966). https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:61965CC0009
  6. CJEU, Court of Justice of the European Union, D. Case 26/62 (5 February 1963). https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:61962CJ0026
  7. CJEU, Court of Justice of the European Union, D. Case 6/64 (15 July 1964). https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:61964CJ0006
  8. CJEU, Court of Justice of the European Union, D. Case 11/70 (17 December 1970). https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:61970CJ0011
  9. CJEU, Court of Justice of the European Union, D. Case 314/85 (22 October 1987). https://eur-lex.europa.eu/legal-content/EN/ALL/?uri=CELEX:61985CJ0314
  10. CJEU, Court of Justice of the European Union, D. Case 14/68 (13 February 1969). https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:61968CJ0014
APA
Jikia, M. (2025). The Impact of EU Law on National Legal Frameworks. Sakarya Üniversitesi Hukuk Fakültesi Dergisi, 13(2), 914-926. https://doi.org/10.56701/shd.1663755
AMA
1.Jikia M. The Impact of EU Law on National Legal Frameworks. SJL. 2025;13(2):914-926. doi:10.56701/shd.1663755
Chicago
Jikia, Mariam. 2025. “The Impact of EU Law on National Legal Frameworks”. Sakarya Üniversitesi Hukuk Fakültesi Dergisi 13 (2): 914-26. https://doi.org/10.56701/shd.1663755.
EndNote
Jikia M (December 1, 2025) The Impact of EU Law on National Legal Frameworks. Sakarya Üniversitesi Hukuk Fakültesi Dergisi 13 2 914–926.
IEEE
[1]M. Jikia, “The Impact of EU Law on National Legal Frameworks”, SJL, vol. 13, no. 2, pp. 914–926, Dec. 2025, doi: 10.56701/shd.1663755.
ISNAD
Jikia, Mariam. “The Impact of EU Law on National Legal Frameworks”. Sakarya Üniversitesi Hukuk Fakültesi Dergisi 13/2 (December 1, 2025): 914-926. https://doi.org/10.56701/shd.1663755.
JAMA
1.Jikia M. The Impact of EU Law on National Legal Frameworks. SJL. 2025;13:914–926.
MLA
Jikia, Mariam. “The Impact of EU Law on National Legal Frameworks”. Sakarya Üniversitesi Hukuk Fakültesi Dergisi, vol. 13, no. 2, Dec. 2025, pp. 914-26, doi:10.56701/shd.1663755.
Vancouver
1.Mariam Jikia. The Impact of EU Law on National Legal Frameworks. SJL. 2025 Dec. 1;13(2):914-26. doi:10.56701/shd.1663755