Statutory Offence (noun)
A "statutory offence" is a type of crime that is defined by specific laws or statutes made by a government, rather than being based on common law (which is based on court decisions). Essentially, it means that something is considered a crime because a law says it is.
In legal discussions, you might encounter terms like "penalties for statutory offences" or "enforcement of statutory offences," which refer to the consequences and the processes involved in dealing with these crimes.
While there aren't specific idioms or phrasal verbs that directly relate to "statutory offence," you might come across phrases like "break the law" or "fall foul of the law," which refer to committing any type of crime, including statutory offences.
A statutory offence is a crime defined by law.