(a) Notwithstanding any other rule of evidence to the contrary, any party may examine a witness testifying under a grant of immunity or pursuant to an arrangement under G.S. 15A-1054 with respect to that grant of immunity or arrangement. A party may also introduce evidence or examine other witnesses in corroboration or contradiction of testimony or evidence previously elicited by himself or another party concerning the grant of immunity or arrangement.
(b) A party may argue to the jury with respect to the impact of a grant of immunity or an arrangement under G.S. 15A-1054 upon the credibility of a witness. (1973, c. 1286, s. 1.)