5. Can non-EU users participate?

It is important to distinguish here between affiliation and nationality. What matters for the access is the affiliation as the H2020 rules prescribe that access for user groups with a majority of users not working in an EU (here it means European Union) or associated country (associated to the H2020 program) is limited to 20% of the total amount of units of access provided under the grant.

According to this rule, the answer is YES, with two clarifications/possibilities:

1. Users working in non-EU countries who are members of a user group where the majority of the users work in an institution established in an EU Member State or Associated State can have access to any infrastructure/facility/installation with no limits.
2. In the case where a user group is constituted by a majority of users not working in an EU or associated country, access to any infrastructure/facility/installation is limited to 20 % of the total amount of units of access offered for that facility.