Origin control in Special Economic Zones: certificates may be reissued and goods must be protected against substitution during transit. These Rules apply origin determination and control to goods passing through a Special Economic Zone, requiring competent authorities to prevent substitution and restrict handling to operations that avoid deterioration. When originating goods imported under a certificate of origin into a Special Economic Zone are fractioned, certifying offices may issue new origin certificates based on the original, covering required quantities until the total is accounted for.