Duty Free Replenishment Certificate exemption: imports permitted duty free subject to licence endorsements, transferability rules and specified port conditions. Exemption from customs duty and Special Additional Duty applies to materials imported under a DFRC licence, conditional on production of the licence at clearance, licence endorsements specifying SION, resultant product particulars and material description/value/quantity, matching technical specifications for Sensitive List items with exporter declaration, non-transferability of fuel, free transferability otherwise, and restricted import/export through specified ports, airports, ICDs, land customs stations or SEZs subject to Commissioner exceptions and deemed export allowances.