Whether the Tribunal can dismiss an appeal for non appearance?

The Supreme Court says NO! The Apex Court says:

"13) Applying the principles laid down in the aforesaid case to the facts of the present case, as the two provisions are similar, we are of the considered opinion that the Tribunal could not have dismissed the appeal filed by the appellant for want of prosecution and it ought to have decided the appeal on merits even if the appellant or its counsel was not present when the appeal was taken up for hearing. The High Court also erred in law in upholding the order of the Tribunal."

Balaji Steel Re-Rolling Mills Vs Commissioner of Central Excise and Customs. Decided by Supreme Court on November 14, 2014.