GST rate amendment adds specified tractor parts and related engines to a reduced tax category, altering taxable classifications. The Government of Gujarat amends Notification No.1/2017-State Tax (Rate) by inserting specified tractor-related goods into Schedule III at the 9% State GST rate, including tyres, tubes, agricultural diesel engines exceeding 250 cc for tractors, hydraulic pumps, braking and transmission components, radiator and cooling systems, silencer and clutch assemblies, steering components, hydraulic parts, and body components; the amendment is made under section 9(1) of the Gujarat GST Act and takes effect from publication in the Official Gazette.