(1) The punishment of death shall be supervised by the superintendent of the penitentiary and shall be inflicted by intravenous injection of a substance or substances in a lethal quantity sufficient to cause death and until the defendant is dead, or, at the election of the defendant, by hanging by the neck until the defendant is dead. In any case, death shall be pronounced by a licensed physician.
(2) All executions, for both men and women, shall be carried out within the walls of the state penitentiary.
Severability—1996 c 251:
"If any provision of this act or its application to any person or circumstance is held invalid, the remainder of the act or the application of the provision to other persons or circumstances is not affected." [ 1996 c 251 § 2.