If a person is, because of section 5 (1) (d), to be taken to have been convicted of a serious offence, a court shall not make a confiscation order in reliance on the person's conviction of the offence unless the court is satisfied, on the balance of probabilities, that the person has absconded and--
(a) the person has been committed for trial for the offence, or
(b) the court is satisfied, having regard to all the evidence before the court, that a reasonable jury, properly instructed, could lawfully find the person guilty of the offence.