Inputs returned from job work after transition: tax exempt if returned within prescribed period; late return shifts tax liability. Transitional rule exempts tax on inputs sent for job work before the appointed day and returned on or after that day if returned within the prescribed period, subject to a limited administrative extension; otherwise tax liability shifts to the job worker on late return or to the manufacturer/despatcher if inputs are not returned. The exemption applies only where the consignor and job worker declare the details of goods held by the job worker on the appointed day in the prescribed form and time.