Section 25(1)(ii) in The Special Economic Zones (Customs Procedures) Regulations, 2003
(ii)the proper officer may, after examining the application and after satisfying himself about the bonafide requirement of the zone unit, grant permission for job-work and such permission shall normally be valid for a period of one-year. However considering the sensitive nature of the commodities to be sent out for job-work and past record of the zone unit, such permission may be less than said period of one year;