Examination without detention
2(1)Where a person has been required by a notice under paragraph 2(4) of Schedule 5 to this Act to submit to further examination but is not detained under paragraph 6 of that Schedule his further examination shall be reviewed by a review officer not later than twelve hours after the beginning of the examination and shall not continue unless that officer has authorised it to continue.
(2)The review officer shall authorise the examination to continue if, and only if, he is satisfied that the enquiries necessary to complete the examination are being carried out diligently and expeditiously.