En Banc Review: When the Full Circuit Rehears a Case

En banc review is a procedure in federal appellate courts under which the full membership of a circuit — rather than the standard three-judge panel — convenes to rehear a case. This page covers the definition, triggering criteria, procedural mechanics, and decision-making boundaries that govern en banc proceedings in the United States Courts of Appeals. Because en banc decisions carry circuit-wide precedential weight, the procedure plays a significant role in resolving intra-circuit conflicts and correcting consequential panel errors.

Definition and scope

Within the federal circuit courts of appeals, most cases are decided by a randomly assigned panel of three judges drawn from the full complement of active circuit judges. En banc review suspends that default structure. When a court sits en banc, the full court — all active circuit judges eligible to participate — rehears the matter collectively. Senior judges who sat on the original panel may participate, but senior judges who did not sit on the original panel generally do not, pursuant to Federal Rules of Appellate Procedure, Rule 35(a) (28 U.S.C. § 46).

The Ninth Circuit, which as of the judicial statistics reported by the Administrative Office of the U.S. Courts carries the largest active-judge roster among all circuits, employs a limited en banc panel of 11 judges rather than convening its full bench of more than 29 active judges (Administrative Office of the U.S. Courts, Circuit Court Statistics). This "limited en banc" practice is expressly authorized by 28 U.S.C. § 46(c) for circuits where en banc hearings by the full court would be impractical.

En banc review is distinct from a petition for certiorari to the U.S. Supreme Court. It operates entirely within a single circuit and does not produce nationally binding precedent; it does, however, bind all district courts and future panels within that circuit.

How it works

The procedure is governed primarily by FRAP Rule 35 and each circuit's local rules. The sequence unfolds in discrete phases:

1. Panel decision issues. A three-judge panel issues its opinion following briefing and, where applicable, oral argument.
2. Petition filed. A party files a petition for rehearing en banc, typically within 14 days of judgment in civil cases or 45 days in cases where the United States is a party, under FRAP Rule 40(a)(1).
3. Circulation to active judges. The clerk circulates the petition to all active judges of the circuit. Any active judge may call for a vote, even if no party has petitioned.
4. Vote taken. A majority of the circuit's active judges in regular active service must vote in favor of rehearing for the petition to be granted. The bare number required varies by circuit size — in a 12-judge circuit, 7 affirmative votes are needed.
5. Supplemental briefing ordered. If granted, the court typically orders supplemental briefs from the parties and may invite amicus curiae briefs from interested non-parties.
6. Argument and decision. The full court (or the limited en banc panel, where applicable) hears argument and issues a new majority opinion, which supersedes the prior panel decision.

The original panel opinion is vacated upon the grant of en banc rehearing. Any concurrences or dissents from that panel opinion lose precedential status but may be cited for persuasive authority.

Common scenarios

En banc rehearing is granted infrequently relative to the volume of panel decisions. The Administrative Office of the U.S. Courts publishes annual caseload statistics showing that petitions for en banc rehearing are denied in the substantial majority of cases across all circuits. Courts concentrate the procedure on a narrow set of recurring circumstances:

Intra-circuit conflict. The most common driver is a conflict between two panel opinions within the same circuit. Because a later panel generally cannot overrule an earlier panel — only the en banc court or the Supreme Court can do so — a recognized split demands en banc resolution. This connects directly to the standards of review applied in different panels to the same legal question.

Questions of exceptional importance. FRAP Rule 35(a)(2) specifically identifies questions of exceptional importance as an independent basis for en banc consideration, separate from any conflict. Constitutional questions, particularly those arising under the First, Fourth, or Fifth Amendments, frequently generate en banc activity. Pages covering constitutional issues on appeal explore the substantive dimensions of these challenges.

Correction of a panel's departure from Supreme Court precedent. Where a panel opinion is perceived to have misapplied a controlling Supreme Court decision, the en banc mechanism provides a circuit-level correction vehicle before the matter escalates to certiorari review.

Criminal and habeas cases. En banc proceedings appear with notable frequency in criminal appeals and habeas corpus appeals, particularly in capital cases, because the stakes of an erroneous panel ruling are irreversible.

Decision boundaries

En banc courts operate under the same appellate jurisdiction as panels — they do not conduct new trials, take fresh evidence, or resolve factual disputes de novo in the way a trial court would. The record on appeal remains fixed. Review is confined to the legal questions identified in the en banc order, which typically specifies the issues to be reheard.

A unanimous en banc opinion carries maximum circuit authority, but split decisions are common. Judges who disagree may file dissents that, while not binding, often telegraph the question's suitability for certiorari. When the en banc court itself fractures without a majority opinion, the precedential effect can be limited, and the reversal, remand, or affirmance that results may require additional litigation to clarify its scope.

The en banc court may affirm the original panel, reverse it, or remand to the district court with instructions. It may also return the matter to a new panel for reconsideration in light of the en banc opinion — an outcome distinct from direct reversal and one that extends the litigation timeline considerably.

En banc decisions can themselves be reviewed by the Supreme Court, which means the procedure sits within the broader appeals process overview as an intermediate, circuit-contained mechanism rather than a terminal one. The appellate timeline and deadlines applicable to subsequent certiorari petitions run from the date of the en banc judgment, not from the original panel decision.

References

• Federal Rules of Appellate Procedure, Rule 35 — En Banc Determination (Legal Information Institute, Cornell Law School)
• Federal Rules of Appellate Procedure, Rule 40 — Petition for Panel Rehearing (Legal Information Institute, Cornell Law School)
• 28 U.S.C. § 46 — Assignment of Judges; Panels; En Banc (Office of the Law Revision Counsel, U.S. House of Representatives)
• Administrative Office of the U.S. Courts — Federal Judicial Caseload Statistics (United States Courts)
• U.S. Courts — Courts of Appeals Overview (United States Courts)