The Rules of Participation (RoP) for the European Open Science Cloud (EOSC) state the standards and conduct required of EOSC participants. EOSC participants agree to adhere to the RoP. Adherence to the RoP is expected to build trust in the EOSC and the resources accessible through EOSC. The RoP are based on the idea to develop quality through transparency and minimise the need for regulation. The rules themselves are high level in order to be generally applicable and long-lived. The commentary on each rule below provides a further level of detail.