Add the countries involved

Style note²Federal courts, Illinois courts21st and 22nd editions

An arbitration citation names the countries involved wherever the rest of it does not; the two inter-state collections report arbitrations between states, so there are always countries to name.¹

1. 1R. 21.6 International Arbitrations and Claims Commissions. Tables: T5 Arbitral Reporters; T10.3 Countries and Regions.
2. 2A style note: the rule in note 1 allows both forms and prefers one.