The OSCE Office for Democratic Institutions and Human Rights (ODIHR), working with Ukraine's Supreme Court, has produced a judicial benchbook on international crimes, ODIHR said on 6 October 2026.

ODIHR presented the resource at a side event during the Warsaw Human Dimension Conference. The session convened legal experts to examine how war crimes trials conducted in Ukraine can contribute to international justice, both inside the country and beyond.

What did ODIHR's side event cover?

National courts occupy a central place in adjudicating war crimes cases, ODIHR told participants. The way those courts apply international law to procedural and substantive questions can shape approaches to comparable cases outside Ukraine, and inform broader criminal-justice policy.

Three themes structured the discussion:

• Documentation and legal classification of crimes
• How domestic prosecutions complement international proceedings
• The role of defence counsel in protecting fair trial rights

The discussion grounded each theme in the day-to-day operation of Ukrainian courts. Participants also considered what Ukrainian case law can offer judges in other jurisdictions dealing with comparable conduct.

What is the ODIHR–Ukraine benchbook?

The benchbook sits within ODIHR's project "Supporting the Human Dimension of Security in Ukraine in Times of Crisis." ODIHR developed the publication jointly with Ukraine's Supreme Court. It functions as a working reference for judges applying international law and fair trial standards in cases involving international crimes.

ODIHR framed the benchbook as a way to make international-law principles more usable at the trial level. The publication consolidates doctrine, evidential guidance and procedural safeguards into one resource that judges can consult during hearings.

The Office linked the benchbook to a wider programme of support for the Ukrainian judiciary. The project covers training and technical assistance alongside the doctrinal reference.

What does the benchbook change for practitioners?

For judges in Ukraine, the resource addresses a recurring problem: applying treaty and customary international law within a domestic procedural code. A consolidated reference reduces the time a judicial panel spends locating foundational standards before and during hearings.

For defence counsel, the publication compiles the procedural safeguards defendants can invoke in international-crimes cases. The Warsaw discussion singled out fair trial rights as a constant pressure point as case volumes rise.

For prosecutors, the benchbook sets out classification frameworks for conduct that may constitute war crimes, crimes against humanity and genocide. The resource also covers how domestic teams can coordinate evidence-sharing with international counterparts.

For practitioners outside Ukraine, the benchbook offers a window into how Ukrainian courts interpret international law in active wartime proceedings. Decisions issued under the resource may carry persuasive weight for judges elsewhere, even though the benchbook itself is a domestic-facing tool.

What comes next?

ODIHR signalled that the benchbook will anchor a continuing programme of judicial training in Ukraine. Planned follow-up work includes workshops for national judges and continued cooperation with the Supreme Court.

The Warsaw Human Dimension Conference brings OSCE participating States together each year to review human-rights commitments. ODIHR's side event placed Ukraine's wartime justice work inside that wider European security conversation, casting domestic trials as both a domestic accountability tool and a contribution to international criminal law.