This means that in journals, such as Nature and Science, in which not all articles are open access, no more money from e.g. NWO, ZonMW and other research funders, may be used to pay Article Processing Charges (APCs). This is only allowed if you publish in fully open access journals.
Open access publishing, at no extra cost, in journals for which universities have a transformative deal does remain possible. Information about this can be found in our Journal Browser.