An arbitral award may be contested on the following grounds:

a.

the single arbitrator was appointed or the arbitral tribunal composed in an irregular manner;

b.

the arbitral tribunal wrongly declared itself to have or not to have jurisdiction;

c.

the arbitral tribunal decided issues that were not submitted to it or failed to decide on a prayer for relief;

d.

the principles of equal treatment of the parties or the right to be heard were violated;

e.

the award is arbitrary in its result because it is based on findings that are obviously contrary to the facts as stated in the case files or because it constitutes an obvious violation of law or equity;

f.

the costs and compensation fixed by the arbitral tribunal are obviously excessive.