TL;DR - Federal Rule of Civil Procedure 16.1 is the first rule in the federal civil rules written specifically for multidistrict litigation (MDL). Before it, the rules did not mention MDL proceedings at all. - It lets the transferee judge schedule an initial management conference soon after the Judicial Panel on Multidistrict Litigation (JPML) transfers cases, and lists topics the parties should address in a report beforehand. - Those topics include appointing leadership counsel, early exchange of information about claims and defenses (such as plaintiff "fact sheets" or a "census"), discovery, likely motions and ways to resolve cases. - The rule is a set of prompts, not a mandatory checklist. Judges keep wide discretion, and the Federal Rules of Civil Procedure otherwise continue to apply. - Jurisdiction: United States federal courts. This is general information, not advice about any individual claim.
What is Rule 16.1?
Rule 16.1 is a Federal Rule of Civil Procedure that sets out a framework for the initial management of MDL proceedings. The Committee Notes to the rule (2025) explain that the MDL statute, 28 U.S.C. § 1407, was adopted in 1968 and that there had been no reference to MDL proceedings in the Civil Rules until Rule 16.1 was added. The notes say the rule is designed to provide a framework for the initial management of MDL proceedings, while preserving the flexibility judges need because not all MDLs present the same management challenges.
For background on what an MDL is and how cases reach one, see our explainer on multidistrict litigation.
What happens at the initial management conference?
Under Rule 16.1(a), the transferee judge (the judge who receives the cases from the JPML) should schedule an initial management conference. The Committee Notes say judges regularly do this soon after the transfer, and that holding the conference is not mandatory under the rule. Under Rule 16.1(b)(1), the court ordinarily orders the parties to meet and submit a single report before the conference, although that report may reflect the parties' divergent views.
Under Rule 16.1(c), the court then enters an initial management order. According to the Committee Notes, that order does not have to cover every topic in the rule, does not need to set the specific scheduling deadlines used in ordinary cases, and the court should be open to modifying it as the MDL develops.
What topics does the rule put on the table?
Rule 16.1(b)(2) asks for the parties' views on: - whether to appoint leadership counsel, including the timing, structure, selection process, responsibilities, communication with other lawyers and compensation (the Committee Notes mention that courts have used the common benefit doctrine to set up protocols for staffing, timekeeping and cost reimbursement, and that a fee order may be best deferred until well into the case); - whether to vacate or modify scheduling orders entered earlier in the courts the cases came from; - a schedule for further management conferences; - how to manage "direct filing" of new actions into the MDL, which the notes say can raise questions such as venue, the court for remand, how statutes of limitations are handled, and choice of law; and - related actions in other courts, including state courts, and how to coordinate with them.
Rule 16.1(b)(3) asks for the parties' initial views on: - consolidated pleadings, such as master complaints; - exchanging information about the factual bases for claims and defenses; - discovery; - likely pretrial motions; - measures to facilitate resolution of the cases; - referral of matters to a magistrate judge or a special master; and - the principal factual and legal issues likely to arise.
The Committee Notes explain that the second list asks only for "initial" views because it may be premature to decide those matters before leadership counsel is appointed.
Does Rule 16.1 create a new plaintiff screening process?
No. Rule 16.1 does not set up a specific plaintiff-vetting procedure. It lists the early exchange of information about claims and defenses as a topic to discuss. The Committee Notes observe that concerns have been raised on both the plaintiff and defense sides that some claims and defenses were asserted without the inquiry required by Rule 11(b), and that some courts have used "fact sheets" or a "census" to survey the claims and defenses in the case, largely as a management method.
The notes add that the level of detail required should be weighed against the burden, that timing may depend on early issues such as general causation or preemption, and that such an exchange may be ordered independently of the discovery rules or under Rules 33 or 34. They also say that, in some circumstances, a court may find it appropriate to use expedited methods to resolve claims or defenses that are not supported after the required exchange.
In practice, this means the form of any plaintiff fact sheet in a given MDL is set by that judge's orders, not by a one-size-fits-all national procedure. Our guide to how mass tort claims work describes the plaintiff fact sheet from a claimant's perspective.
How does the rule relate to bellwether trials and settlement?
Rule 16.1(b)(3)(E) lists measures to facilitate resolution. The Committee Notes say that, in addition to mediation, focused discovery orders, early decisions on principal legal issues, selection of representative bellwether trials and coordination with state courts may help resolution, and that whether to settle is ultimately a decision for the parties. For how test trials work, see our guide to the bellwether trial.
What the rule does not do
- It does not replace the Federal Rules of Civil Procedure. The notes state that the pleading rules and other civil rules continue to apply in MDL proceedings.
- It does not displace Rule 23. If proposed class actions are part of an MDL, Rule 23(g) still governs appointment of class counsel.
- It does not guarantee any outcome, timetable or compensation for any plaintiff.
- It does not change who is eligible to bring a claim or when the deadline to file expires. Time limits depend on the law that applies to each claim.
Why it matters for people following an MDL
Many of the early orders reported in MDL news, such as appointments of leadership counsel, case management orders and fact sheet requirements, follow the topics Rule 16.1 lists. For a recent example of a newly centralized docket moving through its first conferences, see our report on the Dupixent cancer MDL. The glossary on this site defines related terms such as the common benefit fund and transferee judge.
Sources - Fed. R. Civ. P. 16.1 and Committee Notes on Rules (2025), Legal Information Institute, Cornell Law School: law.cornell.edu/rules/frcp/rule_16.1 (United States federal courts; read October 23, 2026). - 28 U.S.C. § 1407, Multidistrict litigation: law.cornell.edu/uscode/text/28/1407.
The rules and Committee Notes are summarized here in our own words. Check the current official text of the rule and any order in a specific MDL before relying on it.
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