Of course there are! For example, you may want to cite the text or parts thereof in technical literature, use standards for educational purposes, or distribute them to customers, partners or other third parties not belonging to your company. Or you may want to create an advertising brochure, develop software, etc. that involves text(s) from a standard. In this case, please refer to the online information available at the DIN website https://www.din.de/en/about-standards/standards-and-the-law/standards-and-copyright. The Legal Department for the DIN Group can help you with further questions.