When should expert reports be disclosed to other active parties?

The correct answer is that expert reports must be disclosed before the hearing in which they will be used; otherwise, they are likely to be deemed inadmissible. This requirement ensures that all parties have a fair opportunity to examine and respond to the evidence presented, maintaining the principles of procedural fairness and transparency within the legal process.

In the context of civil procedure, timely disclosure of expert reports allows other parties to prepare adequately for trial, including the opportunity to challenge the credibility and reliability of the expert’s conclusions. If a party fails to disclose an expert report prior to the hearing, the court may refuse to allow the report to be entered into evidence, thus preventing the party from relying on that expert's testimony during the proceedings.

Other options suggest varying approaches to timeliness and the manner of disclosure. Some imply flexibility or conditions that do not align with the established requirements of procedural fairness in civil litigation. Properly adhered timelines are essential for effective case management and ensuring that the judicial process is efficient and fair for all parties involved.