Customs Procedure Codes (CPCs) are alphanumeric codes used by HMRC (Her Majesty's Revenue and Customs) to identify the purpose of imports or exports and the applicable customs regime. These codes are essential in categorizing and processing shipments. CPCs consist of either a seven-digit number or a six-digit number followed by a letter, representing the specific reason for the shipment. They determine the appropriate customs procedures, such as duty rates, exemptions, or special requirements, related to the import or export transaction. CPCs play a critical role in ensuring accurate classification, collection of duties and taxes, and compliance with customs regulations. By assigning the correct CPC to a shipment, businesses can facilitate efficient customs processing and meet the requirements of the relevant customs regime.