What is an ex post facto law?

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An ex post facto law is one that is made retroactive to punish an act that wasn't illegal at the time it was committed. For example, if I didn't wear my seatbelt and wearing one wasn't a law, but it became a law the next day, I couldn't get in trouble for it because the "crime" was committed before it was against the law.
Article I of the US Constitution specifically says this cannot be done. Laws that don't involve penalties can reference dates in the past to allow an income tax break or permit eligibility for a program based on past actions (such as fighting in a war).
The reason the Constitution prevents Congress (and the states) from writing ex post facto laws is to protect the population and other entities from government abuse.
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Define ex post facto law?

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Because the founders recognized the natural right to weigh theconsequences of individual action beforehand. Ex post facto laws,remove that right from the individual, as no one

What is an example of ex post facto law?

An ex post facto law (from the Latin for "from after the action") or retroactive law, is a law that retroactively changes the legal consequences (or status) of actions committ

An example of ex post facto law?

An example would be if a woman was driving in Illinois and thespeed limit was 50mph. So she drove exactly 50mph. The passingpolice officer checked her speed and insured that s
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What type of law is the ex post facto law?

An ex post facto law is a law which is retroactive. This type of law allows for criminal punishments for previous deeds which were considered legal at the time. It may also
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What exactly is an ex post facto law?

An ex post facto law is a law that retrospectively changes the legal consequences of actions that were committed. An ex post facto law is one that is made retroactive to punis