Excise exemption for notified industrial units: duty confined to amount attributable to value addition, with refund and special rate process. Exemption limits excise duty on eligible clearances from notified industrial areas to an amount equivalent to duty on value addition, calculated by reference to a prescribed Table; manufacturers must submit monthly duty and CENVAT statements for verification and refund, may take the computed amount as account current credit under conditions, and may apply for a Commissioner fixed special rate based on audited financial records where actual value addition exceeds the Table rate.