Permit Validity and Error Messages Permit Validity The validity period of an import permit is determined based on factors such as the type of goods involved, purpose of import, and place of release and receipt. Generally, the validity period for the different types of import permits are as follows: Import Permit (Message Type) Validity Period In-Non-Payment Approval date + 9 working days For declaration type (Blanket - BKT): approval date declared blanket start date to until the end of the calendar month In-Payment Approval date + 9 working days Approval date + 2 working days if items are dutiable and released from Customs licensed premises Note: If the goods are not removed within the stipulated period, you may extend the validity of the permit via TradeNet before the permit expires. Error Messages If an import declaration is incomplete or contains errors, a rejection message with the code "DCS Error" will be sent through TradeNet. For declarations that do not meet Singapore Customs’ or other Competent Authorities’ requirements, a rejection message with the code "CA/SC Reject" will be sent. You should re-submit the import declaration after rectifying the errors or omissions. The re-submission will be considered a fresh declaration with a new unique reference number (URN).