Section 12 deals with the various ways in which the detention of persons found not guilty by reason of insanity or unfit to be tried, whether they are in a prison or other designated centre, including persons detained under military law, may be reviewed. In the case of a prison this applies to the governor who shall act on the advice of an approved medical officer and in the case of a psychiatric hospital, the chief medical officer. The review board has the responsibility for ensuring the detention of such persons is reviewed at six monthly or at such lesser intervals as it considers appropriate. In cases where a person who has not been acquitted is no longer unfit to be tried, the court of committal has to be so informed and shall order that the person be brought before it to be dealt with as it thinks proper. In the case of detention under military law the appropriate authority has to be similarly informed in order that the court martial shall be reconvened.