(a) A person may be pronounced dead by a qualified physician, or by a registered professional nurse authorized to make a pronouncement of death under Code Section 31-7-176.1, if it is determined that the individual has sustained either (1) irreversible cessation of circulatory and respiratory function, or (2) irreversible cessation of all functions of the entire brain, including the brain stem.

(b) A person who acts in good faith in accordance with the provisions of subsection (a) of this Code section shall not be liable for damages in any civil action or subject to prosecution in any criminal proceeding for such act.

(c) The criteria for determining death authorized in subsection (a) of this Code section shall be cumulative to and shall not prohibit the use of other medically recognized criteria for determining death.