How does the Pakistani law deal with statutory contravention and what is the burden of proof?

Contravention of a Statute can be punishable with two years imprisonment or fine or both, as well as confiscation of the property in respect of which the offence has been committed. Forum of such trial is either before a magistrate or an adjudication officer having the powers of a first class magistrate or a tribunal constituted by the Federal Government having these powers and appeal lies to the central government from an order of the adjudication officer or to High Court on appeal from the tribunal. Burden of proof rests with accused to show that he had permission to enter into the dealings or transactions, or to do the acts done.