(1)  Each person arraigned in a criminal trial is allowed to challenge peremptorily 6 potential jurors.

(2)  .  .  .  .  .  .  .  .  

(3)  A person arraigned may –

(a) if that person has peremptorily challenged 6 potential jurors, challenge peremptorily one reserve juror; or

(b) if that person has peremptorily challenged fewer than 6 potential jurors, challenge peremptorily a number of reserve jurors that is equal to 6 minus the number of potential jurors challenged under subsection (1) plus one.

(4)  This section does not apply to an investigation under the Criminal Justice (Mental Impairment) Act 1999 .

(5)  Unless the court orders otherwise, a potential juror in respect of whom a peremptory challenge is made –

(a) is to return to the panel; and

(b) may be selected on a jury for another trial.