A magistrate constituting the Children's Court may issue a warrant to arrest a child if—
(a) a notice is served on the child under section 307 or 308(1) and—
(i) the child fails to appear before the Court at the time specified; and
(ii) the Court is satisfied that the notice has come to the attention of the child; or
(b) service of a notice under paragraph (a) cannot be effected.