Key legal question
Whether the criminal court could review the legality of the administrative entry ban underlying the offence.
Extracted holding
The criminal court may review legality, but not expediency; where no administrative appeal is available, review includes legality only, not suitability.
Extracted reasoning
A person cannot be punished for disobeying an unlawful administrative decision, but the criminal court may not substitute its own assessment of expediency for that of the immigration authority.