GST rate omission for specific pump parts alters tax applicability under schedule following a notification amending classification. Tariff item 8414 90 12, covering parts of air or vacuum pumps and compressors of bicycle pumps, was subject to GST at 12% under Schedule 2 until its omission by Notification No. 6/2022-Integrated Tax (Rate) effective 18.7.2022, which removed the item from the schedule and changed its tax classification and applicability.