STC, as the publisher of U_IID codes for the Czech Republic, wants to inform you that the changes resulting from the new implementing regulation 2023/448 are currently working on the TT system.

  1. An overview of changes and technical information will be available on our website and will be sent to contact persons at the same time.
  2. We are preparing an overview of changes and technical information about the impact on the system. We will inform you about the news on our website – and at the same time we will send them to the contact persons of individual manufacturers.

We are currently developing changes as required by the version 2.0.0 specification. We expect to publish the revised interface specification by 10/31/2023. The specification will be provided in the same form as before, i.e. in Swagger.

We plan to deploy the modifications to the test QA environment on November 21, 2023.

  1. In the case of a solution to connect to secondary storage where Dentsu is the provider, all information can be found here:
  2. If you have any other questions, please do not hesitate to contact us at