UncategorizedGuidance: Simplified Process for Internal Market Movements (SPIMM) and UK Carrier (UKC) Scheme: Additional Procedure Codes Find out additional instructions for specific data elements that may be used with each 3-digit Additional Procedure Code. Guidance: CDS Declaration Completion Instructions for Imports Guidance: Appendix 2: DE 1/11: Additional Procedure Codes of the Customs Declaration Service (CDS)