NJ RULES OF EVIDENCE NJRE RULE 601. GENERAL RULE OF COMPETENCY
Every person is competent to be a witness unless (a) the judge finds that the proposed witness is incapable of expression concerning the matter so as to be understood by the judge and 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) except as otherwise provided by these rules or by law.
