1934
PUBLIC LAW 93-595-JAN. 2, 1975
[88 STAT.
supplies the rule of decision, the privilege of a witness, person, government, State, or political subdivision thereof shall be determined in accordance with State law. ARTICLE: V L
WITNESSES
Rule 601. General Rule of Competency Every person is competent to be a witness except as otherwise provided in these rules. However, in civil actions and proceedings, with respect to an element of a claim or defense as to which State law supplies the rule of decision, the competency of a witness shall be determined in accordance with State law. Rule 602. Lack of Personal Knowledge A witness may not testify to a matter unless evidence is introduced sufficient to support a finding that he has personal knowledge of the matter. Evidence to prove personal knowledge may, but need not, consist of the testimony of the witness himself. This rule is subject to the provisions of rule 703, relating to opinion testimony by expert witnesses. Rule 603. Oath or Affirmation Before testifying, every witness shall be required to declare that he will testify truthfully, by oath or affirmation administered in a form calculated to awaken his conscience and impress his mind with his duty to do so. Rule 604. Interpreters An interpreter is subject to the provisions of these rules relating to qualification as an expert and the administration of an oath or affirmation that he will make a true translation. Rule 605. Competency of Judge as Witness The judge presiding at the trial may not testify in that trial as a witness. No objection need be made in order to preserve the point. Rule 606. Competency of J u r o r as Witness (a) A t the trial.—A member of the jury may not testify as a witness before that jury in the trial of the case in which he is sitting as a juror. If he is called so to testify, the opposing party shall be afforded an opportunity to object out of the presence of the jury. (b) Inquiry into validity of verdict or indictment.—Upon an inquiry into the validity of a verdict or indictment, a juror may not testify as to any matter or statement occurring during the course of the jury's deliberations or to the effect of anything upon his or any other juror's mind or emotions as influencing him to assent to or dissent from the verdict or indictment or concerning his mental processes in connection therewith, except that a juror may testify on the question whether extraneous prejudicial information was improperly brought to the jury's attention or whether any outside influence was improperly brought to bear upon any juror. Nor may his affidavit or evidence of any statement by him concerning a matter about what he would be precluded from testifying be received for these purposes. Rule 607. Who May Impeach The credibility of a witness may be attacked by any party, including the party calling him.
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