For the upcoming renovation of the Saarbrücken pedestrian zone, the city has even verpflichet to accept only natural stones with a certificate. It is still open, for which material one decides. But if they buy natural stone from overseas, they will pay attention to the certification already in the tender: “The criteria to be fulfilled will be laid down in the tender documents and the tenderers must prove the certification of the materials used.” Please refer: Saarbrücker Zeitung
This approach is exemplary, as far as the tendering process is concerned, that the material offered must be certified and that all bidders can adapt accordingly.
Please refer:
Ausbeuterische Arbeitsbedingungen in der neuen Saarbrücker Bahnhofstraße ausschließen
