The purpose of the eTIR technical specifications is to translate the eTIR functional specifications into technical requirements, architectures, guidelines, procedures and detailed descriptions of all messages exchanged between the eTIR international system and the eTIR stakeholders. This publication is relevant for all eTIR stakeholders (customs authorities, guarantee chains and holders) which need to interconnect their information systems with the eTIR international system. All aspects of these specifications must be considered as mandatory, unless specified otherwise. The scope of this publication is twofold: to define the technical aspects of the TIR international system and to define unambiguously how information is exchanged between the eTIR international system and the eTIR stakeholders.