GST classification change for friction materials following omission from Schedule affects tax treatment and supplier compliance obligations. Omission from Schedule 4 removed the entry for friction material and articles thereof (sheets, rolls, strips, segments, discs, washers, pads), not mounted, based on asbestos, other mineral substances or cellulose, whether or not combined with textiles or other materials, thereby changing its statutory classification and the GST treatment that follows and affecting tax classification, supply reporting and supplier compliance.