Gujarat Land Revenue Code, 1879
At any time within thirty days from the date of the sale of immovable property application may be made to the Collector to set aside the sale on the ground of some material irregularity, or mistake, or fraud, in publishing or conducting it ; But, except as is otherwise provided in the next following section, no sale shall be set aside on the ground of any such irregularity or mistake, unless the applicant proves to the satisfaction of the Collector that he has sustained substantial injury by reason thereof. If the application be allowed, the Collector shall set aside the sale, and direct a fresh one.