A. The punishment of death shall be carried out by the administration of a lethal quantity of a drug or drugs until death is pronounced by a licensed physician according to accepted standards of medical practice. For purposes of this subsection, the Uniform Controlled Dangerous Substances Act¹ shall not apply to the Department of Corrections or to any person who participates in the execution or administers one or more controlled dangerous substances.

B. If the execution of the sentence of death as provided in subsection A of this section is held unconstitutional by an appellate court of competent jurisdiction or is otherwise unavailable, then the sentence of death shall be carried out by nitrogen hypoxia.

C. If the execution of the sentence of death as provided in subsections A and B of this section is held unconstitutional by an appellate court of competent jurisdiction or is otherwise unavailable, then the sentence of death shall be carried out by electrocution.

D. If the execution of the sentence of death as provided in subsections A, B and C of this section is held unconstitutional by an appellate court of competent jurisdiction or is otherwise unavailable, then the sentence of death shall be carried out by firing squad.