12It is settled case-law that Article 14(1) of Decision No 1/80 precludes expulsion as a rule of a Turkish national following a criminal conviction and as a deterrent to other aliens, without the personal conduct of the person concerned giving reason to consider that he will commit other serious offences prejudicial to the requirements of public policy in the host Member State (Case C-340/97 Nazli [2000] ECR I-957).
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