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  4. Rule 15. Briefs in Opposition; Reply Briefs; Supplemental Briefs
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Supreme Court Rules

Rule 15. Briefs in Opposition; Reply Briefs; Supplemental Briefs

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    1. A brief in opposition to the petition for a writ of certiorari may be filed by the respondent in any case, but is not mandatory except in a capital case, see Rule 14.1(a) or when ordered by the Court.

    2. A brief in opposition should be stated briefly and in plain terms. In addition to presenting other arguments for denying the petition, the brief in opposition should address any perceived misstatement of fact or law in the petition that bears on what issues properly would be before the Court if certiorari were granted. Counsel are admonished that they have an obligation to the Court to point out in the brief in opposition, and not later, any perceived misstatement made in the petition. Any objection to consideration of a question presented based on what occurred in the proceedings below, if the objection does not go to jurisdiction, may be deemed waived unless called to the Court’s attention in the brief in opposition. A brief in opposition should identify any directly related cases that were not identified in the petition under Rule 14.1(b)(iii), including for each such case the information called for by Rule 14.1(b)(iii).

    3. Any brief in opposition shall be filed within 72 hours after the case is placed on the docket, unless the time is extended by the Court or a Justice, or by the Clerk under Rule 30.

    4. A brief in opposition may not be joined with any other pleading. The brief in opposition shall be served as required by Rule 29.

    5. No motion by a respondent to dismiss a petition for a writ of certiorari may be filed. Any objections to the jurisdiction of the Court to grant a petition for a writ of certiorari shall be included in the brief in opposition.

    6. The Clerk will distribute the petition to the Court for its consideration upon receiving an express waiver of the right to file a brief in opposition, or, if no waiver or brief in opposition is filed, upon the expiration of the time allowed for filing. If a brief in opposition is timely filed, the Clerk will distribute the petition, brief in opposition, and any reply brief to the Court for its consideration no less than 3 days after the brief in opposition is filed, unless the petitioner expressly waives the 3-day waiting period.

    7. Any petitioner may file a reply brief addressed to new points raised in the brief in opposition, but distribution and consideration by the Court under paragraph 5 of this Rule will not be deferred pending its receipt. The reply brief shall be served as required by Rule 29.

    8. If a cross-petition for a writ of certiorari has been docketed, distribution of both petitions will be deferred until the cross-petition is due for distribution under this Rule.

    9. Any party may file a supplemental brief at any time while a petition for a writ of certiorari is pending, calling attention to new cases, new legislation, or other intervening matter not available at the time of the party’s last filing. A supplemental brief shall be restricted to new matter and shall follow, insofar as applicable, the form for a brief in opposition prescribed by this Rule. The supplemental brief shall be served as required by Rule 29.

    Notes

    • Rule 15(3) Amended on July 12th, 2025.

    • Amended on June 13th, 2025, to take effect on June 28th, 2025.

    Previous ruleRule 14. Content of a Petition for a Writ of Certiorari Next ruleRule 16. Disposition of a Petition for a Writ of Certiorari
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