In the frame of a European H2020 project, we are creating educational content for companies on the topic of energy efficiency in industry. The educational content will be made publicly available under a Creative Commons license on an online platform in the form of editable Word documents and Powerpoint presentations. The idea is that companies with access to the material will be able to modify the documents to suit their specific needs (e.g. add their logos, adapt or translate the text...).
In this context, I would like to know if it is possible to incorporate freely (i.e. without asking any sort of permission) the logo of an ISO standard in a Powerpoint presentation that will be made available on an online platform?
More generally, my question applies to other types of logos (companies, associations...)?