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Rule 703. ?Bases ofan Expert?s Opinion Testimony.


An expertmay base an opinion on facts or data in the case that the expert has been madeaware of or personally observed. If experts in the particular field wouldreasonably rely on those kinds of facts or data in forming an opinion on thesubject, they need not be admissible for the opinion to be admitted. But if thefacts or data would otherwise be inadmissible, the proponent of the opinion maydisclose them to the jury only if their probative value in helping the juryevaluate the opinion substantially outweighs their prejudicial effect.



EffectiveNovember 1, 2009



2011 Advisory Committee Note. ?The language of this rule has been amended as part of therestyling of the Evidence Rules to make them more easily understood and to makestyle and terminology consistent throughout the rules. These changes areintended to be stylistic only. There is no intent to change any result in anyruling on evidence admissibility. This rule is the federal rule, verbatim.


Original Advisory Committee Note.? This rule is the federal rule, verbatim. The 2009 amendment adoptschanges made to Federal Rule of Evidence 703 effective December 1, 2000.