"Relevant evidence" , about a defendant, is evidence about—
(a) a cognitive impairment of the defendant within the meaning of the Criminal Code , section 348B ; or
(b) a mental health impairment of the defendant within the meaning of the Criminal Code , section 348C ; or
(c) the effect of an impairment mentioned in paragraph (a) or (b) on the defendant’s ability to communicate, including whether the impairment was a substantial cause of the person not saying or doing anything as mentioned in the Criminal Code , section 348A (4) (b) .