Wyo. Stat. Ann. § 19-13-209

In any case or controversy involving performance or interpretation of or liability under a mutual aid agreement entered into between one (1) or more fire protection services, emergency medical care providers, homeland security programs or local government subdivisions of this state and one (1) or more fire protection services, emergency medical care providers, homeland security programs or local government subdivisions of another state or of the United States, the parties to the agreement are the real parties in interest. This state may maintain an action against any fire protection service, emergency medical care provider, homeland security program or local government subdivision whose default, failure, performance or other conduct caused or contributed to a loss or liability incurred by the state.