Single Window Systems
In the OIC Member States
49
certificates are sent back to the MS Customs Declaration Processing System and linked with
the SAD for further processing.
Figure 15: Issuing of Permits and Certificates and Customs Clearance on EU Level
Source: Authors’ own construction
The digital signature for every transaction between traders and the Single Window and CDPS
is mandatory43. The digital signatures are issued by Accredited Certified Authorities based on
the authorization for e-communication for all customs procedures44.
Czech Single Window ICT Architecture
The CZSW is integrated within a centralized IT Architecture with the Customs Management
system (Customs declaration processing system (CDPS)). The IT Architecture is based on a
Service-Oriented Architecture (SOA) for the CDPS and other DG TAXUD IT Systems45. The
interconnectivity and interoperability with the DG TAXUD IT Systems and EU certificates
databases is via secure communication network - CCN/CSI (common communication
network/common systems interface). Web services are used for exchange of information, data
and additional documents, messages standards UN/EDIFACT (the latest upgrade of the CSI is
converting EDIFACT to XML messages standard and vice versa). The Czech Customs services
are using the business process catalogue from DG TAXUD (ARIS Business Process Analysis
Platform) for business process modelling and management.
43 Art. 199(4b) of EU Reg. 2454/93 and Law 227/2000 Coll. on e-signature
44 Rules & conditions are in Art 199(4a) of EU Reg. 2454/93 (used for identification and verification of the traders).
45 These IT systems include, inter alia, the databases for Authorised Economic Operators and for Electronic Binding Tariff
Information. For an overview and description se (Accessed
January 2017).