Local Lodge No. 1424, International Association of MacHinists, Afl-Cio v. National Labor Relations Board

Summary

The Supreme Court held that the unfair‑labor‑practice complaints against the employer and union were barred by the six‑month statute of limitations in §10(b) of the NLRA because the complaints were based on the illegal execution of the collective‑bargaining agreement, which occurred outside the limitations period. The Court distinguished this situation from cases where evidence of prior events merely illuminates a contemporaneous violation. Two dissenting opinions argued that the majority misread §10(b) and that the enforcement of the agreement within six months constituted a continuing violation not barred by the limitations period.