Grounds for challenging an arbitral award under sections 67-69 of the Arbitration Act 1996 include issues related to the substantive jurisdiction of the tribunal, serious irregularities causing injustice, and errors of law. Disagreements with findings of fact are generally not grounds for challenge unless they involve serious irregularities. 

Key Point: This question tests knowledge of the specific grounds for challenging arbitral awards under the Arbitration Act 1996.