N.j. R. Evid. 601
As amended through October 28, 2024
Every person is competent to be a witness unless (a) the court finds that the proposed witness is incapable of expression so as to be understood by the court and any jury either directly or through interpretation, or (b) the proposed witness is incapable of understanding the duty of a witness to tell the truth, or (c) as otherwise provided by these rules or by law.
N.j. R. Evid. 601