Question juridique clé
Whether the complaint against the earlier interim award was admissible as a separate challenge
Solution extraite
The hearing-violation complaint could not be raised independently against the interim award; it was admissible only against the final award.
Motifs extraits
Under the IPRG, interim awards may be challenged only on the grounds listed for such decisions. Denial of the right to be heard is not among them and must be invoked against the final award.