A.R.S. § 13-4021: Competency to be executed; definition

A. A person who is sentenced to death shall not be executed as long as he is mentally incompetent to be executed.

B. As used in this article, "mentally incompetent to be executed" means that due to a mental disease or defect a person who is sentenced to death is presently unaware that he is to be punished for the crime of murder or that he is unaware that the impending punishment for that crime is death.