Sixth Circuit Narrows ERISA's Scope in Union Conflict Cases
The Sixth Circuit ruling limits ERISA's application by emphasizing labor law preemption.
Why it matters: The decision impacts how employers handle union disputes, requiring more careful strategic planning, particularly in cases involving collective bargaining agreement contributions.
- On April 3, 2026, the Sixth Circuit ruled in Rieth-Riley v. Local 324 Trustees.
- ERISA claims were preempted by the NLRA under Garmon preemption.
- The ruling denied a preliminary injunction for lack of success likelihood.
- Employers must rethink strategies in collective bargaining due to potential labor law priority.
An April 3, 2026, decision by the Sixth Circuit in Rieth-Riley Construction Co. v. Trustees of Operating Engineers’ Local 324 Fringe Benefit Funds, No. 25-1823, has limited ERISA’s reach by confirming the preemption of its claims under labor law. This ruling is based on the Garmon preemption doctrine, which prioritizes the National Labor Relations Board (NLRB) for resolving labor disputes arguably within its jurisdiction.
In the case, Rieth-Riley faced a legal challenge for placing post-expiration collective bargaining agreement contributions into escrow. The court found that the NLRA's focus on labor disputes overrode the ERISA claims, implying employers might not leverage ERISA protections if the issue could involve collective bargaining processes governed by the NLRB.
The decision underscores a significant interface between ERISA and labor law, emphasizing that labor law may take precedence, particularly in critical collective bargaining scenarios. This ruling suggests a strategical pivot for employers, who must assume that labor law could overshadow ERISA in cases related to union agreements as analyzed by legal commentators.
By the numbers:
- April 3, 2026 — Date of the Sixth Circuit decision
- Garmon preemption — Centered on labor law primacy
Yes, but: While this limits ERISA's reach, it remains a significant statute in non-labor contexts.
What's next: Employers should monitor further legal developments that balance ERISA and labor law interactions.