If an application for a confiscation order in respect of a person's conviction of a serious offence is made to the court before which the person was convicted of the offence whether or not that court is constituted in the same way as it was constituted when the person was convicted of the offence.(a) the application may be dealt with by that court; and(b) any function or power may be exercised and any duty may be performed by that court in relation to the confiscation order