Ex Post Facto Clause Claim Anspruch auf Klausel ex post facto Ex Post Facto Clause Claim Reclamo de Cláusula Ex Post Facto Reclamo de Cláusula Ex Post Facto Réclamation de clause ex post facto תביעת סעיף אקס פוסט פקטו एक्स पोस्ट फैक्टो क्लॉज क्लेम 事後法条項請求 Reivindicação de cláusula ex post facto 事后法律条款索赔 An Ex Post Facto Clause claim is a legal argument asserting that a law or action violates the Ex Post Facto Clause of the United States Constitution. This claim contends that the law or action retroactively imposes punishment or changes the legal consequences of an act, which is prohibited by the Ex Post Facto Clause.