The award in Serafín García Armas and others v. Venezuela (PCA Case No.2013-3) (administered under the 1976 UNCITRAL Rules) was released in April 2019. This post refers to two decisions by Mr. Hugo Siblesz on challenges brought by Venezuela to the claimants’ appointment of Prof. Guido Tawil as party-appointed arbitrator. Mr. Siblesz was acting in…