Permit Validity and Error Messages Permit Validity The validity period of an import permit depends on the type of goods involved, purpose of import, place of release and/or receipt. 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 same calendar month In-Payment Approval date + 9 working days Approval date + 1 working day if items are dutiable and released from Customs licensed premises *Note: Please refer to the specific validity periods for each permit. If you are unable to utilise the permit within the stipulated period, please extend the validity period of the permit via TradeNet before it expires. Error Messages If a permit application is incomplete or erroneous, you will be prompted with an error code, 'DCS Error' generated via TradeNet. For permit applications that do not meet Singapore Customs’ or other Competent Authorities’ requirements, you will receive a rejection message via TradeNet with the code, 'CA/SC Reject'. Please submit a new import permit application after rectifying the errors or omissions. A new Unique Reference Number (URN) will be provided for the new permit application.