Section 112(5) in The Punjab Goods and Services Tax Act, 2017
(5)On receipt of notice that an appeal has been preferred under this section, the party against whom the appeal has been preferred may, notwithstanding that he may not have appealed against such order or any part thereof, file, within forty five days of the receipt of notice, a memorandum of cross-objections, verified in the prescribed manner, against any part of the order appealed against and such memorandum shall be disposed of by the Appellate Tribunal, as if it were an appeal presented within the time specified in sub-section (1).