The Federal Court for the Middle District of Tennesse has a local rule on expert witness that has been criticized for decades. The rule provides as follows
"Expert witness disclosures shall be made timely in accordance with any order of the Court, or if none, in accordance with Fed. R. Civ. P. 26(a)(2). Expert witness disclosure statements shall not be supplemented after the applicable disclosure deadline, absent leave of Court. No expert witness shall testify beyond the scope of his or her expert witness disclosure statement. The Court may exclude the testimony of an expert witness, or order other sanctions provided by law, for violation of expert witness disclosure requirements or deadlines. …"
Rule 39(c)(6)(d). Not all of the judges enforced the Rule.


