251.—In any proceedings for an offence under this Part, or any offence mentioned in Schedule 1, it shall not be necessary for the child in respect of whom an offence is alleged to have been committed to be brought before a court or to be present for all or any part of the proceedings unless the court, either of its own motion or at the request of any of the parties to the proceedings, is satisfied that the presence of the child is necessary for the proper disposal of the case.