Magnesium Casting Co. v. National Labor Relations Board

Decided February 23, 1971. William Orville Douglas delivered the opinion of the Court.

Docket 370 · 401 U.S. 137 (1971) · Cited 106 times

Holding

Under 3(b) of the National Labor Relations Act the NLRB is permitted to delegate to the regional director its authority to determine the appropriate bargaining unit, and plenary review by the NLRB of such determination is not mandatory.

The Court’s statement of the holding, from the opinion’s syllabus. The syllabus is prepared by the Reporter of Decisions and is not part of the opinion of the Court — read the official opinion for authority.

How the Justices voted

Decided 9–0.

“Concurring” means agreeing with the outcome; any split shown is the Court’s judgment, not each Justice’s reasoning. Source: the Supreme Court Database (Spaeth et al.), Washington University.

Precedents cited

Supreme Court decisions this opinion relies on, ordered by how often it cites each. Cases in our collection link through; others are named.

• Universal Camera Corp. v. National Labor Relations Board · 340 U.S. 474 (1951)
• Pittsburgh Plate Glass Co. v. National Labor Relations Board · 313 U.S. 146 (1941)

Cited by

Later Supreme Court opinions in our collection that cite this case.

• Wisconsin Department of Industry, Labor & Human Relations v. Gould Inc. · 475 U.S. 282 (1986)
• National Labor Relations Board v. Kentucky River Community Care, Inc. · 532 U.S. 706 (2001)

Official text

Read the official opinion (U.S. Reports, govinfo.gov)

Explore from here

William Orville Douglas’s profile · All Supreme Court opinions · The Supreme Court

Source: Supreme Court of the United States, slip opinions (1971). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-07-03. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).