United States: Litigation, Mediation & Arbitration

A judgment creditor who has prevailed in a US federal or state court and seeks to enforce that judgment against assets located in Türkiye will find no bilateral treaty awaiting them.

On March 12, 2026, a division of the Colorado Court of Appeals issued a significant opinion concerning federal preemption, aviation law, and environmental nuisance. In Town of Superior v. Board of County Commissioners of Jefferson County, 2026 COA 14, the division held that federal law preempts a state court from ordering an airport proprietor to ban certain aircraft operations as a noise abatement measure, even though the proprietor itself retains the authority to impose such restrictions voluntarily.

This issue examines three significant federal appellate court decisions that shape class action litigation: the Fourth Circuit's analysis of ERISA claims and Rule 23(b)(1) certification requirements...