Yes. The external researchers or research groups are not beneficiaries of the grant. So it doesn’t matter if they host any other researchers (in the frame of other projects or programmes) at their facility. Important for getting access to a facility of the Integrating Activity is that the proposed research meets the criteria of transnationality and quality and that they do not have the possibility to carry out the proposed tasks at their home organisation. So the answer is yes, only the core partners offer access to their facility under the EC grant. It is not obligatory that all of the beneficiaries offer this access.