Contractual arbitration (arbitrato irrituale) is of a contractual nature and the resulting award has contractual effect, with the consequence that the regime governing its challenge is set out in Article 808-ter of the Code of Civil Procedure.
The grounds for challenging a contractual arbitral award under Article 808-ter of the Code of Civil Procedure are exhaustive.
Neither the expiry of the time limit for the decision nor an erroneous assessment of the accrual of interest on the sums in dispute constitutes a ground for annulment, as they fall outside the grounds therein provided.