Kaiser Steel Corp. v. Mullins

1982-01-13

Headline: Coal producer allowed to argue purchased‑coal fee is illegal; Court reversed lower rulings and sent the case back so employers can raise antitrust and labor‑law defenses, affecting pension trustees and employers.

Holding: The Court reversed and held that a coal company sued for unpaid contributions may plead and have decided a defense that the purchased‑coal payment clause is illegal under antitrust law or the NLRA’s ban on hot‑cargo agreements.

Real World Impact:

Allows employers to raise antitrust or labor‑law illegality defenses in pension collection suits.
Permits courts to decide hot‑cargo (NLRA) issues when relevant to enforcement.
Says ERISA’s 1980 amendment does not eliminate all illegality defenses.

Topics: pension fund collections, antitrust and labor law, hot‑cargo agreements, employer contract defenses

Summary

Background

A steel company that also produces coal (Kaiser) signed a union contract that required payments to health and retirement funds. The contract included a purchased‑coal clause that made Kaiser pay when it bought coal from other producers not under the union contract. After the contract expired, the trustees of the union funds sued Kaiser for unpaid contributions based on those purchases. Kaiser admitted nonpayment but said the purchased‑coal clause was illegal under the antitrust laws and the labor law ban on "hot‑cargo" arrangements.

Reasoning

The Court asked whether a company sued to collect promised pension payments can raise and have decided a defense that the promise itself was illegal. The majority said yes. The opinion explains that courts will not enforce illegal promises, that a clause linking payments to purchases could itself be unlawful, and that a federal court may decide whether the clause violates the NLRA’s hot‑cargo ban rather than leaving that question entirely to the Labor Board. The Court also considered the 1980 change to ERISA (often called §306(a) or ERISA §515) and concluded that it does not eliminate defenses that show a contribution clause is illegal.

Real world impact

The decision lets employers raise antitrust or labor‑law defenses when trustees sue to collect contributions tied to specific contract clauses, and sends the case back for the courts to decide the clause’s legality. The ruling is not a final finding on whether the purchased‑coal clause is illegal; that question must be decided on remand.

Dissents or concurrances

Justice Brennan (joined by two Justices) dissented, arguing Congress intended the 1980 ERISA amendment to narrow defenses in trustees’ collection suits and would have barred the kind of consequential illegality Kaiser raised.