( September 10, 2026, 8:53 AM EDT) -- WASHINGTON, D.C. — The Republic of Bulgaria tells the District of Columbia Circuit U.S. Court of Appeals in an appellant brief that a district court erred by failing to review conflicting European Union treaties before confirming an International Centre for Settlement of Investment Disputes (ICSID) award against it worth more than 61 million euros plus more than $5.2 million in attorney fees in favor of a Maltese solar power investor for breaches of the Energy Charter Treaty (ECT)....