Customs exemption changes: Raw silk and SPMCIL machinery import duty adjustments with conditional eligibility notification The notification inserts Serial No. 164A granting nil duty on raw silk of grade 3A and above subject to new Condition 5C, and inserts Serial No. 270A permitting concessional import of specified machinery, spares and consumables for security paper and banknote manufacture and processing by SPMCIL at the stated standard rate with no additional duty. Condition 5C restricts the raw silk concession to imports by the National Handloom Development Corporation up to an aggregate annual quantity and requires a certificate from a Ministry of Textiles officer not below Joint Secretary.