(April 22, 2021, 1:39 PM EDT) -- MIAMI — An international group of construction firms on April 19 filed a petition in a Florida federal court to vacate an arbitral award worth more than $240 million that they were ordered to pay the Panamanian operator of the Panama Canal due to alleged “evident partiality” on the part of all three arbitrators, arguing that the tribunal members failed to disclose external appointments and outside work with counsel for the canal operator that may have influenced their decision-making during the arbitration....