Mealey's ( October 8, 2026, 2:56 PM EDT) -- WASHINGTON, D.C. — The Kingdom of Spain on Oct. 7 filed an appellant brief with the District of Columbia Circuit U.S. Court of Appeals in consolidated appeals in which it is challenging the confirmation of six arbitral awards against it, writing that D.C. Circuit precedent regarding its agreement to arbitrate disputes under the Energy Charter Treaty (ECT) with European Union investors is wrong and urging the court to overrule that precedent....