October Term 2024 · Docket 24-7

Does a fuel seller have standing to challenge a waiver that limits vehicle fuel types?

Diamond Alternative Energy argues the EPA waiver harms its business. The EPA argues the company lacks standing to sue.

Official caption
Diamond Alternative Energy, LLC v. EPA
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Verified source milestones

  1. — An official oral-argument transcript was verified.
  2. — An official oral-argument transcript was verified.
  3. — An official Court opinion was verified.

The arguments, in order

This case may have been argued more than once. Each entry below uses that session's official transcript. Later arguments do not erase earlier ones.

  1. Argument 1 ·

    What happened at the argument

    Jeffrey Wall argued the waiver limits liquid fuel vehicles.

    Wall claimed vacating the waiver would redress the company's injury.

    Kneedler argued the company seeks a categorical rule for redressability.

    Klein stated federal courts do not assume standing exists.

    Read the official transcript for this argument · Official argument details

    Sources used for this argument breakdown

A citizen's guide to the whole case

What this case is about

The case tests whether a fuel seller can sue over a waiver that restricts vehicle fuel types. The company claims the waiver blocks its sales. The agency claims the company cannot prove direct harm.

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How the case got here

The Supreme Court heard oral argument in this case on April 23, 2025.

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What each side wants

Diamond Alternative Energy wants the Court to find it has standing to sue.

The EPA wants the Court to dismiss the case for lack of standing.

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What each side says

Diamond Alternative Energy argues the waiver directly impedes its product sales.

The EPA argues the company cannot prove the waiver causes its injury.

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What the justices asked

Justice Thomas asked how the company would prove its claim.

Justice Sotomayor asked why the Court should issue an advisory opinion.

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Why it matters

The outcome defines when businesses can challenge government rules. It sets the standard for proving market harm in court.

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What happens next

This article currently covers the argument record. Use the official docket link for later case activity.

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Official Court provenance

Official docket and case history · Official Supreme Court oral-argument detail page

Verified official opinions and orders

Title and summary sources

Revision history

  1. Revision 1 · Post Opinion ·

    Correction: Rewritten to the concise citizen-facing editorial standard.

  2. Revision 2 · Post Opinion ·

    Correction: Migrated to the dated official Court activity contract without model use.

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