Prior information requirement: importer must file Form IGCR-1 and obtain IIN before availing exemption benefits. Importer must file one-time prior information on the common portal in Form IGCR-1 listing importer and job worker details, goods produced, description of imported inputs, applicable exemption notification, output service nature, and intended import ports; such information may be updated. Upon acceptance an Import of Goods at Concessional Rate Identification Number (IIN) is generated. To avail an exemption, the importer must submit a continuity bond with appropriate surety or security as prescribed by the Deputy or Assistant Commissioner of Customs and undertake to pay the duty difference and interest under section 28AA from import until full payment.