The Supreme Court heard oral arguments Wednesday regarding a legal challenge brought by the environmental advocacy group Prutehi Guåhan. The group contends that the Air Force’s decision to apply for a permit renewal with the Guam Environmental Protection Agency (GEPA) qualifies as a federal "agency action." Under this interpretation, the group argues that the military is legally obligated to perform a comprehensive environmental review before proceeding with munitions detonations on the island.

The core of the dispute involves the interpretation of federal environmental statutes and whether the administrative act of seeking a local permit necessitates a broader federal environmental assessment. The Air Force has maintained that its activities are subject to existing protocols and that the specific procedural requirements cited by the plaintiffs do not apply in this context. During the proceedings, the Justices questioned both parties on the scope of federal oversight and the potential implications for military operations in the territory. The Court’s eventual ruling will determine the extent to which the military must integrate federal environmental review processes into its local permit applications in Guam.