Section 16(1) in The Karnataka Transparency In Public Procurements Act, 1999
(1)Any tenderer aggrieved by an order passed by the Tender Accepting Authority other than the Government under section 13 may appeal to the prescribed authority within thirty days from the date of receipt of the order:Provided that the prescribed authority may, in its discretion allow further time not exceeding thirty days for preferring any such appeal, if it is satisfied that the appellant had sufficient cause for not preferring the appeal in time.