October Term 2018 · Docket 16-1498

Does the Yakama treaty block Washington state fuel taxes on tribal members?

Cougar Den argues the treaty bars state fuel taxes. Washington claims the tax applies to all buyers.

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Washington State Dept. of Licensing v. Cougar Den, Inc.
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Verified source milestones

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

    Washington's lawyer stated the tax applies to fuel, not travel.

    Cougar Den's lawyer claimed the treaty secures the right to travel.

    Justice Sotomayor questioned whether states can tax out-of-state fuel purchases.

    Justice Kagan asked advocates to assume the treaty preempts general taxes.

    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

This case tests if a 1855 treaty blocks state fuel taxes on tribal members.

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How the case got here

The Supreme Court heard oral argument in this case on October 30, 2018.

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What each side wants

Washington wants to collect fuel taxes from tribal members.

Cougar Den wants to avoid state fuel taxes under the treaty.

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What each side says

Washington argues the tax targets fuel, not travel.

Cougar Den argues the treaty protects the right to travel.

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What the justices asked

Justice Sotomayor asked if states can tax fuel bought out of state.

Justice Kagan asked if the treaty preempts general taxes.

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Why it matters

This dispute defines the boundary between state tax power and tribal sovereignty.

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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

Title and summary sources

Revision history

  1. Revision 1 · Official Transcript ·

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

  2. Revision 2 · Official Transcript ·

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

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