The retailer Rewe Group, testing service provider TÜV Rheinland, municipal enterprise Berliner Stadtreinigung and the industrial company Steinbeis Papier have published as first companies their declarations of conformity according the German Sustainability Code (GSC).The GSC makes the sustainability performance of companies and organizations measurable and comparable. He will contribute to a stronger orientation towards sustainability on capital markets. In a press release the company's management lays open their motivation to support the transparency instrument. The German Sustainability Code, as adopted by the Council for Sustainable Development in October 2011, is now published as a printed brochure and can be requested in the order service.