Classification of Goods — Thus it emerges that the customer is providing only chassis. All inputs/materials required for fabrication of bus body, has to be used by the applicant from its own account. Under such situation it is the bus-body which is being fabricated and also being mounted on the chassis provided by the customer. Therefore, it is not merely job-work. Rather it is supply of bus body and an activity of fitting/mounting of bus body on chassis is an ancillary activity to the principal activity of supply of bus-body. Hence, in terms of the clarification issued by the CBEC vide circular No.34/8/2018-GST dt.03.03.2018, the impugned activity is a composite supply, with principal supply being supply of bus-body.Paras Motor Industries [2018] 2 TAXLOK.COM 234 (AAR-Haryana)