Texas Rules of Evidence Rule 602
Rule 602. Need for Personal Knowledge
A witness may testify to a matter only if evidence is introduced sufficient to support a finding that the witness has personal knowledge of the matter. Evidence to prove personal knowledge may consist of the witness’s own testimony. This rule does not apply to a witness’s expert testimony under Rule 703.
History: Added Feb. 25, 1998, eff. March 1, 1998; amended effective April 1, 2015