A. The penalty of death shall be inflicted by an intravenous injection of a substance or substances in a lethal quantity sufficient to cause death, under the supervision of the state department of corrections.
B. A defendant who is sentenced to death for an offense committed before November 23, 1992 shall choose either lethal injection or lethal gas at least twenty days before the execution date. If the defendant fails to choose either lethal injection or lethal gas, the penalty of death shall be inflicted by lethal injection.
C. The identity of executioners and other persons who participate or perform ancillary functions in an execution and any information contained in records that would identify those persons is confidential and is not subject to disclosure pursuant to title 39, chapter 1, article 2.
D. If a person who participates or performs ancillary functions in an execution is licensed by a board, the licensing board shall not suspend or revoke the person's license as a result of the person's participation in an execution.