269H—Mental unfitness to stand trial
A person is mentally unfit to stand trial on a charge of an offence if the
person's mental processes are so disordered or impaired that the person
is—
(a)
unable to understand, or to respond rationally to, the charge or the
allegations on which the charge is based; or
(b)
unable to exercise (or to give rational instructions about the exercise of)
procedural rights (such as, for example, the right to challenge jurors); or
(c)
unable to understand the nature of the proceedings, or to follow the evidence
or the course of the proceedings.