Art and part is a term used in Scots law

Scots law

Scots law is the legal system of Scotland. It is considered a hybrid or mixed legal system as it traces its roots to a number of different historical sources. With English law and Northern Irish law it forms the legal system of the United Kingdom; it shares with the two other systems some...

 to denote the aiding or abetting in the perpetration of a crime, or being an accessory before or at the perpetration of the crime. There is no such offence recognized in Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 as that of being an accessory

Accessory (legal term)

An accessory is a person who assists in the commission of a crime, but who does not actually participate in the commission of the crime as a joint principal...

 after the fact.

Under section 293 of the Criminal Procedure (Scotland) Act 1995, a person may be convicted of, and punished for, a contravention of any enactment, notwithstanding that he was guilty of such contravention as art and part only.