
The concept of punishing individuals for acts that were legal when committed but are now illegal is prohibited in some countries. In the US, the constitution forbids ex post facto laws at both the federal and state levels. Similarly, in Germany, Art. 103 Abs.2 stipulates that an act can only be punished if it was punishable by law before it was committed. However, there are exceptions to this principle, such as the Radbruch formula, which states that existing law must be ignored if it is unjust. This formula has been applied in cases involving Nazi Germany and East Germany. The European Convention on Human Rights also includes a similar provision, stating that no one shall be held guilty of an act that did not constitute a criminal offense under national or international law at the time it was committed. In Canada, the Canadian Charter of Rights and Freedoms guarantees that individuals cannot be found guilty of an act that was not an offense under Canadian or international law at the time it was committed. While the US generally adheres to the principle of null poena sine lege praevia, there have been exceptions, such as the United States v. Chambers case, where the Supreme Court ruled that a prosecution for violating the National Prohibition Act could not continue after the constitutional provision was repealed.
Can the law punish for something that could have happened?
| Characteristics | Values |
|---|---|
| In the US | Depends on the state. Some jurisdictions go by the law as it existed at the time of the offense; others go by the later, more lenient version. |
| In Germany | Art. 103 Abs.2: "An act can only be punished if it was punishable by law before the act was committed." |
| In Canada | Section 11(g) of the Canadian Charter of Rights and Freedoms states that any person charged with an offense has the right not to be found guilty unless at the time of the act, it constituted an offense. |
| In France | The constitution states that all people convicted of crimes that cease to be crimes under a change in the law are entitled to benefit from the change in the law. |
| Exceptions | In United States v. Chambers, the Supreme Court said that a prosecution for a violation of the National Prohibition Act could not be continued as the constitutional provision that allowed the act was repealed. |
| Exceptions | The Radbruch formula is a principle that overrides existing law if it is unbearably unjust. It has been applied to prosecute deeds committed in Nazi Germany and East Germany that were arguably legal in those jurisdictions. |
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What You'll Learn
- In the US, ex post facto laws are prohibited
- In Germany, an act can only be punished if it was punishable by law before it was committed
- The Radbruch formula overrides existing law if it is deemed unbearably unjust
- In the US, the state determines whether to go by the law at the time of the offence or a later version
- In France, people convicted of crimes that are no longer illegal are entitled to benefit from the change in law

In the US, ex post facto laws are prohibited
In the United States, ex post facto laws are prohibited by the Constitution, which forbids the federal government and the states from enacting such laws. Ex post facto laws, in a legal context, typically refer to criminal statutes that punish actions retroactively, thereby criminalising conduct that was legal when originally performed.
The US Constitution's two Ex Post Facto Clauses prohibit Congress and the states from passing any laws that apply ex post facto. The federal clause (Article I, Section 9, Clause 3) states: "No Bill of Attainder or ex post facto Law shall be passed". The state clause (Article I, Section 10, Clause 1) states: "No State shall [...] pass any [...] ex post facto Law".
The Supreme Court has interpreted these clauses to ban legislatures from enacting laws that impose criminal liability or increase criminal punishment retroactively. This means that an act can only be punished if its punishability was determined by law before the act was committed. This principle is known as "nulla poena sine lege praevia" or "no punishment without prior law".
However, there are some exceptions to this principle. For example, in the case of California Dep't of Corrections v. Morales, the Supreme Court held that a law amending parole procedures to decrease the frequency of parole-suitability hearings did not violate the ex post facto prohibition, as it did not alter the definition of criminal conduct or increase the penalty for a crime. Similarly, in United States v. Chambers, the Supreme Court ruled that a prosecution for a violation of the National Prohibition Act could not be continued after the constitutional provision that allowed the act was repealed.
The prohibition of ex post facto laws is based on the rationale of legal certainty, which allows individuals to determine whether an action is legal or not at the time they intend to commit it. The prospect of future law changes that retroactively alter the legality of actions puts individuals in a state of legal insecurity, which is the opposite of what codified law aims to achieve.
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In Germany, an act can only be punished if it was punishable by law before it was committed
In Germany, the current Constitution, which came into effect on 23 May 1949, upholds the principle that an act can only be punished if it was punishable by law before it was committed. This is a fundamental aspect of the rule of law, ensuring legal certainty and preventing arbitrary punishment.
Germany has a civil law system, which means that court decisions in individual cases are generally not legally binding. However, the decisions of higher regional courts and the Federal Court of Justice are granted high authority, and lower courts often build on these decisions. This system provides a framework for consistent and predictable legal outcomes.
The German legal system has a comprehensive set of laws addressing various aspects of criminal and civil conduct. For example, the German Criminal Code criminalizes several forms of domestic violence, including dangerous bodily injury, insults, and sexual violence, regardless of the relationship between the victim and the offender. These offences carry specific penalties, such as prison sentences and fines, which are outlined in the relevant sections of the Criminal Code.
Additionally, Germany's International Criminal Code outlines specific punishments for violations during times of war and armed conflict. These include punishments for military commanders who neglect their supervisory duties, as well as for individuals who engage in pillaging, destruction of property, or the use of prohibited means of warfare.
Historically, there have been periods where the rule of law was undermined, particularly during the Nazi regime. After the Reichstag Fire in 1933, civil liberties were suspended, and Hitler was granted legislative power, allowing him to create laws without Reichstag consent. This led to the enactment of numerous discriminatory and punitive decrees targeting Jews and other marginalized groups.
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The Radbruch formula overrides existing law if it is deemed unbearably unjust
The Radbruch formula, a legal theory formulated by German law professor and politician Gustav Radbruch, states that a judge can override existing law if it is deemed unbearably unjust or in deliberate disregard of human equality before the law. This theory is rooted in Radbruch's experience of the judiciary in Nazi Germany and has been applied in court decisions in the Federal Republic of Germany, particularly in cases concerning National Socialist crimes.
The formula emphasizes the balance between justice, purposiveness, and legal certainty. It acknowledges that positive law takes precedence, even if it is unjust, unless the conflict between the statute and justice is intolerable, rendering the statute as 'flawed law'. In such cases, the statute must yield to justice. This principle has been used to prosecute and sentence acts committed in Nazi Germany and East Germany, despite the defendants arguing that their actions were legal according to the statutes in place at the time.
The Radbruch formula introduces a moral dimension to legal interpretation, asserting that certain legal norms can be deemed legally defective if they fail to meet a particular moral criterion. This is a significant departure from legal positivism, which demands a strict separation between law and morality. Radbruch's formula aims to empower jurists to prevent the recurrence of unjust laws by providing them with a tool to challenge statutes that are unbearably unjust.
While the Radbruch formula has been influential in German legal philosophy and decision-making, it is not without its critics. Some argue that it introduces ambiguity and potential abuse, as the determination of "unbearably unjust" can be subjective. Additionally, the formula's application may result in a loss of legal certainty, as individuals may face legal insecurity due to the retroactive nature of challenging existing laws.
In conclusion, the Radbruch formula serves as a powerful tool to address unjust laws and statutes by allowing judges to override existing law if it is deemed unbearably unjust. Its application has been crucial in holding individuals accountable for acts committed under oppressive regimes, even if those acts were legal at the time. However, the formula's potential for abuse and its impact on legal certainty are important considerations that must be carefully navigated.
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In the US, the state determines whether to go by the law at the time of the offence or a later version
In the US, the concept of ex post facto laws, which are laws that apply to an action retroactively, are prohibited by the Constitution. This is encoded in the legal principle nulla poena sine lege praevia, which means "no punishment without [a] prior law". This principle is also reflected in the US Constitution, which states that no ex post facto law shall be passed.
However, there are some nuances and exceptions to this rule. Firstly, it depends on the state, as some jurisdictions abide by the law as it existed at the time of the offence, while others follow the later, more lenient version. Secondly, if a conviction was final and all appeals had been exhausted when a new court decision is announced, the conviction remains valid, and the sentence must be served. An exception to this is if the new law constitutes a "new rule" rather than an interpretation of existing law. In such cases, the "new rules" can have retroactive effects, as seen in the case of United States v. Chambers, where the Supreme Court ruled that a prosecution for violating the National Prohibition Act could not continue after the constitutional provision enabling the Act was repealed.
Additionally, the Radbruch formula is a principle that overrides existing law if it is deemed to be unjust. This was applied to prosecute and sentence actions that were legal in Nazi Germany and East Germany.
In summary, while the US Constitution prohibits ex post facto laws, there are exceptions and nuances that allow for the prosecution and punishment of actions that may have been legal at the time they were committed.
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In France, people convicted of crimes that are no longer illegal are entitled to benefit from the change in law
In France, criminal law is defined as a sector of French law that combines public and private law to punish private behaviour on behalf of society as a whole. French criminal law is governed by the country's current penal code, which was enacted in 1994. The code outlines the rules that define, categorise, prevent, and punish criminal offences committed by a person, whether a natural person (Personne physique) or a legal person (Personne morale).
French criminal law divides offences into three categories of increasing severity: crimes, délits, and contraventions. Crimes are punishable by 15 years or more of imprisonment, délits are punishable by between two months and ten years of imprisonment, and contraventions are punishable by a fine and/or other measures such as driver's license suspension or mandatory attendance at courses, but do not carry jail time. The offence must be proven to be punishable for complicity to also be punishable. The perpetrator must be mentally competent and must have consented to the commission of a criminal act of their own free will.
Additionally, French criminal law requires the presence of a material element (élément matériel) and a moral element (élément moral) for a criminal case to be considered. The material element refers to the visible, external part of the offence, such as the actions or words involved in carrying out a criminal act. The moral element refers to the psychological attitude of the perpetrator, including their intent, recklessness, or negligence. Without the moral element, there is no offence.
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Frequently asked questions
In the US, the constitution forbids ex post facto laws on both the federal and state levels. This means that an act can only be punished if it was punishable by law before the act was committed. However, there are exceptions to this, such as in the United States v. Chambers case, where the Supreme Court said that a prosecution for a violation of the National Prohibition Act could not be continued after the constitutional provision that allowed the act was repealed.
In the US, if a person's conviction was final and all appeals had been exhausted when the new court decision was announced, the conviction remains valid and the sentence must be served. However, if the conviction was not yet final and post-conviction motions or appeals were still pending, the new rule of law could be used to challenge the conviction.
Yes, in Germany, Art. 103 Abs. 2 states that "an act can only be punished if it was punishable by law before the act was committed." Similarly, the Radbruch formula, a principle that overrides existing law if it is unjust, has been applied in Europe to prosecute deeds committed in Nazi Germany and East Germany that were arguably legal at the time.
The Canadian Charter of Rights and Freedoms states that any person charged with an offence has the right not to be found guilty on account of any act or omission unless it constituted an offence under Canadian or international law at the time.
Yes, in certain circumstances, a prosecutor may decide not to press charges even if an act was illegal when it was committed. For example, if a law changes to make an offence less serious or there is a shift in the moral consensus around an issue, prosecutors may be less likely to pursue charges for actions that were illegal when they were committed.




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