European Union law, Constitutional law & legislative advisory

About the practice

The practice of European Union law, constitutional law and legislative advice is one of the main pillars of our Law Firm. For many years, our team of experienced experts has been actively involved in drafting and reviewing legal acts, including regulatory impact assessments.

In the past, the Law Firm’s lawyers have prepared legislative opinions or expert opinions, as well as draft normative acts for the Chancellery of the President of the Republic of Poland, the Sejm of the Republic of Poland (Bureau of Analyses of the Sejm or the Marshal of the Sejm), the Chancellery of the Prime Minister, ministries or central offices, as well as private entities, including associations of entrepreneurs or employers, industry organisations or trade unions. The Law Firm’s partners have also acted as legislative advisors to European Union bodies, including the European Parliament and the European Economic and Social Committee.

We provide legislative services at every stage of the law-making process, from the design stage, through proceeding, to the assessment of the compliance of the applicable normative act with the law. Taking care of the interests of our clients, we help them to actively participate in the legislative process, as well as monitor changes in regulations that have a direct impact on their business.


  • Preparation of legal opinions and professorial expertise on the compliance of the proposed legal solutions with the Constitution and EU law;
  • Providing legal advice in the field of broadly understood constitutional law;
  • Drafting laws, regulations, local or domestic law acts and other normative acts (including soft law bills);
  • Drafting opinions and legislative corrections of draft laws, regulations and any other normative acts;
  • Drafting and filing constitutional complaints to the Constitutional Tribunal;
  • Representing clients in proceedings before the Constitutional Tribunal and administrative courts in cases concerning hierarchical inconsistency of legal acts;
  • Preparation of motions for declaring a legal act inconsistent with the Constitution of the Republic of Poland;
  • Drafting opinions on the legitimacy of drafting and filing an extraordinary appeal;
  • Drafting actions for annulment of an act to the Court of Justice of the European Union;
  • Drafting and filing a complaint with the European Commission on behalf of our Clients;
  • Representing clients in proceedings before the European Commission and other institutions and bodies of the European Union.
  • Monitoring of legal changes concerning regulations directly related to the client’s business.

dr hab. Krzysztof Koźmiński

  • Attorney-at-law
  • ·
  • Managing partner

dr hab. Krzysztof Koźmiński

  • Attorney-at-law
  • ·
  • Managing partner

Rzeczpospolita: The opinion of Dr. Krzysztof Kozminski on the establishment of a modern system for marking and registering dogs and…

According to the proposal The Parliamentary Group on the Future of the World. Protection of Animal Rights concerning. the establishment of a modern…

“The Future of Law” – XXV conference of the Faculty of Law and Administration of the UW with the participation…

As early as April 5, 2024. titled “The Future of Law,” the XXV conference of the Faculty of Law and Administration of the…

National Scientific Conference of the Center for Regulatory Impact Assessment of the University of Warsaw is coming soon

The managing partners of Jabłoński Koźmiński Law Firm – Michał Jabłoński, PhD and dr hab. Krzysztof Koźmiński as long-time educators and organizers of…