English to Bulgarian Law/Patents Law (general) criminal law

"Statutory offence" in the UK, as opposed to "offence",
e.g. 'This offence is therefore reserved for situations where there is no statutory offence, but the behaviour of the police officer should nevertheless be treated as criminal, or where it would be inappropriate to use the statutory offence (e.g. because of evidential difficulties), or where the maximum sentence for the statutory offence is entirely insufficient to reflect the seriousness of the misconduct."