(1) For the purpose of this article, a person is “incompetent to stand trial” when he is charged with a crime and, because of mental illness or defect is unable:
(a) To understand the nature and purpose of the proceedings against him; or(b) to make or assist in making his defense.(2) Whenever the words “competent,” “competency,” “incompetent” and “incompetency” are used without qualification in this article, they shall refer to the defendant’s competency or incompetency to stand trial, as defined in subsection (1) of this section.
