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Rule 195.6. Amendment and Supplementation (Aug. 1998)


A party's duty to amend and supplement written discovery regarding a testifying expert is governed by Rule 193.5. If an expert witness is retained by, employed by, or otherwise under the control of a party, that party must also supplement the expert's deposition testimony or written report, but only with regard to the expert's mental impressions or opinions and the basis for them.

Aug. 4, 1998, eff. Jan. 1, 1999.

Prior Amendments Future Amendments
  Nov. 9, 1998, eff. Jan. 1, 1999

Notes and Comments

Comments to 1999 change:

1. This rule does not limit the permissible methods of discovery concerning consulting experts whose mental impressions or opinions have been reviewed by a testifying expert. See Rule 192.3(e). Information concerning purely consulting experts, of course, is not discoverable.

2. This rule and Rule 194 do not address depositions of testifying experts who are not retained by, employed by, or otherwise subject to the control of the responding party, nor the production of the materials identified in Rule 192.3(e)(5) and (6) relating to such experts. Parties may obtain this discovery, however, through Rules 176 and 205.

3. In scheduling the designations and depositions of expert witnesses, the rule attempts to minimize unfair surprise and undue expense. A party seeking affirmative relief must either produce an expert's report or tender the expert for deposition before an opposing party is required to designate experts. A party who does not wish to incur the expense of a report may simply tender the expert for deposition, but a party who wishes an expert to have the benefit of an opposing party's expert's opinions before being deposed may trigger designation by providing a report.


Nov. 9, 1998, eff. Jan. 1, 1999