An expired ATA Carnet cannot be used for importing goods into Singapore. In such cases, importers have two options: they can either apply for a Temporary Import permit to cover the goods entry into Singapore, or obtain appropriate Customs permits for the movement of goods in and out of Singapore. It is crucial to note that at the checkpoint, a valid ATA Carnet must be presented alongside the goods for clearance. If you lack a valid ATA Carnet, ensure you have secured the appropriate alternative documentation as outlined above before attempting to bring goods into Singapore.