Since December 1, 2025, the parties' discovery plan must address how and when privilege claims will be logged. The change moves the fight earlier and alters what a mandamus petition can complain about.
Privilege-log disputes have long arrived at the worst moment: late in discovery, after thousands of documents have been withheld, when a finding of waiver can strip protection from a whole category of material. The amendments to the Federal Rules of Civil Procedure that took effect on December 1, 2025, try to bring that dispute forward. This article explains the change and its effect on review by mandamus. The underlying law of logs and waiver is covered in Work Product, Privilege Logs and Waiver.
What changed
The Supreme Court transmitted the amendments to Congress in April 2025, and they took effect on December 1, 2025, as listed on the judiciary's current rules page. Two provisions work together:
- Rule 26(f)(3)(D) now requires the parties' discovery plan to state their views on any issues about claims of privilege or work-product protection, "including the timing and method for complying with Rule 26(b)(5)(A)", and, if they agree on a procedure for asserting such claims after production, whether to ask the court to include it in an order under Federal Rule of Evidence 502.
- Rule 16(b)(3)(B)(iv) now allows the scheduling order to include the timing and method for complying with Rule 26(b)(5)(A), together with any agreements on asserting privilege after production. According to the committee note, the words "and management" were added to the title of Rule 16(b) to recognize that the court will often do more than set a schedule.
The committee note explains the purpose: early attention to the method of compliance avoids problems that arise when disputes surface only at the end of discovery. It suggests that rolling production may help identify disputes early and acknowledges that there is no single standard for all cases.
Why it matters for mandamus
Most privilege rulings cannot be appealed before final judgment after Mohawk Industries, Inc. v. Carpenter, 558 U.S. 100 (2009), which leaves mandamus as one of the few routes for an especially injurious or novel ruling; see Privilege Orders After Mohawk. The amendments change the setting in which such a petition is judged.
- The yardstick becomes the order. Where the scheduling order fixes how and when claims are logged, a later finding of waiver will often turn on whether a party complied with that order. Compliance with a case-specific order is a question of discretion and fact, which the writ does not ordinarily reach.
- A clearer legal error is easier to show. Conversely, a district court that imposes a waiver inconsistent with the method it previously approved, or that disregards a Rule 502(d) order incorporated into the scheduling order, presents the kind of identifiable legal error that a petition needs.
- Timing objections cut harder. A party that agreed to a logging method and did not object at the Rule 16 conference will have difficulty arguing later that the method itself was unlawful.
Practical steps
Raise the logging method at the Rule 26(f) conference, propose concrete terms such as categorical logging, date ranges or rolling deadlines, and ask that any agreement on post-production claims be entered as a Federal Rule of Evidence 502(d) order rather than left as a contract between the parties. A party that does so creates a record from which any later dispute can be decided, and from which a court of appeals can tell whether a waiver ruling departed from the law or simply applied the order.
The same amendment package added a new Rule 16.1 for multidistrict litigation, discussed in New Rule 16.1 and Mandamus in MDL. Mandamus decisions of all kinds are tracked, for immigration cases, in Mandamus Case Law Updates.
Key points
- Since December 1, 2025, Rule 26(f)(3)(D) requires the discovery plan to address the timing and method of complying with Rule 26(b)(5)(A).
- Rule 16(b)(3)(B)(iv) lets the scheduling order fix that timing and method and incorporate post-production agreements.
- The committee note aims to move privilege disputes earlier and recognizes there is no single standard.
- A later waiver ruling will often be measured against the order, which narrows the legal error a mandamus petition can show.
- Agreements on post-production claims should be entered as Rule 502(d) orders.
Links in this article to Mandamus.com point to the site of a law practice in the same network as this publication. They are identified here so that the reader can tell a publication from a practice before following them; see the editorial policy.