/ˈnʊləm ˈkraɪmɛn ˈsiːne ˈleɪɡiː/ – Latin phrase
Definition: không có hành vi phạm tội không được xác định trong luật pháp.
A more thorough explanation: “Nullum crimen sine lege” is a Latin legal principle that translates to “no crime without law.” This principle signifies that an act cannot be considered a crime and punished unless it is clearly defined and prohibited by law at the time the act was committed. In other words, there can be no punishment without a pre-existing law that defines the specific conduct as criminal.
Example: The principle of nullum crimen sine lege means that no one can be punished for an act that was not a crime at the time it was committed.