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Private power to make rules

Department of Transportation v. Association of American Railroads

Updated Oct 22, 2026

In brief

The Court treated Amtrak as a government entity for this issue and sent the case back, leaving the constitutional challenge unresolved.

Where it stands
Decided

Decided 9-0 · March 9, 2015 · Opinion by Justice Kennedy

What it’s about
The Association of American Railroads challenged performance standards that Amtrak and the Federal Railroad Administration jointly developed, arguing that Congress gave lawmaking power to a private entity.
Who it affects
Amtrak must be treated as a government entity when the standards’ validity is assessed, but the Court did not resolve the railroads’ constitutional challenge.

Summary: written with AI from the case record.

Illustration for Department of Transportation v. Association of American Railroads
Conceptual illustration · AI-generated

What it's about

The Court decided that Amtrak is a government entity when assessing the standards’ validity, wiped out the appeals court’s ruling (vacated it), and sent the case back for further consideration (remanded), leaving the constitutional challenge unresolved.

Amtrak and the Federal Railroad Administration jointly developed the performance standards that the Association of American Railroads challenged.

The dispute centers on whether Amtrak can be treated as private when it helps a federal agency develop standards.

Question presented

Are the metrics and standards invalid because Congress gave a private entity, Amtrak, the authority to create them?

What the Court decided

Holding

For purposes of determining the validity of the metrics and standards, Amtrak is a governmental entity. 721 F. 3d 666, vacated and remanded.

Result
Vacated

The vote

  • Joined the judgment
  • Concurred in a separate opinion
  • Wrote an opinion
Majority · 8joined the Court's opinion
  1. Breyer
  2. Kagan
  3. Scalia
  4. Kennedywrote the opinion
  5. Ginsburg
  6. Sotomayor
  7. Roberts
  8. Alitoalso wrote separately
Concurring · 1agreed with the result, wrote separately
  1. Thomaswrote separately
9 justices joined the judgment (1 writing separately).

What's next

The appeals court will reconsider the Association’s constitutional challenge in light of the Supreme Court’s ruling about Amtrak’s status.

Documents

1

Docket activity

9
  • New analysis added

    Oct 22, 2026 · Court records

  • AI analysis generated: Case Briefing

    Oct 22, 2026 · Generated

  • New analysis added

    Oct 22, 2026 · Court records

  • AI analysis generated: Impact Analysis

    Oct 22, 2026 · Generated

  • AI analysis generated: Opinion Summary

    Oct 22, 2026 · Generated

Show 4 more
  • AI analysis generated: Decision Record

    Oct 22, 2026 · Generated

  • Case data updated: summary, question_presented, generation_metadata

    Oct 22, 2026 · Court records

  • Case data updated: question_presented, extraction_metadata

    Oct 18, 2026 · Court records

  • Opinion added: Opinion

    Mar 9, 2015 · Court records

More questions

1
Did the Court decide whether the standards were unconstitutional?
No. It decided that Amtrak is a government entity for assessing the standards and sent the remaining constitutional challenge back for further review.

Sources

Primary materials plus reporting. Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.

Checked Oct 22, 2026Methodology

Court records and filings

Reporting and analysis