Judgment of the Court (Grand Chamber) of 16 July 2026.#Criminal proceedings against EGB and Others.#Reference for a preliminary ruling – Combating terrorism – Article 83(1) TFEU – Directive (EU) 2017/541 – Article 3 – Terrorist offences – Article 4 – Offences relating to a terrorist group – Article 15(1) – Obligation to provide for effective, proportionate and dissuasive criminal penalties – Effectiveness – Principle of legal certainty – Principle of equal treatment and non-discrimination – Primacy of EU law – Principle of sincere cooperation – National amnesty law which provides for the extinction of criminal liability – Acts which have not intentionally caused serious breaches of human rights.#Case C-666/24.