(a)
(1) Whenever a defendant has been held for trial and the defense of insanity is an issue in the matter, the defendant or some person for him or her shall file a motion or request for an order of examination in the office of the clerk of the circuit court.
(2) The clerk shall immediately give notice in writing of the filing of the motion or request to the prosecuting attorney or his or her deputy.
(3) The motion or request shall be immediately presented to the circuit judge.
(b) If the court has reason to believe that the defendant should be examined and observed by reason of the suggestion of the prosecuting attorney or other court official or those interested in the defendant, it may enter the order on its own motion.