The European Commission has released the draft Model Grant Agreement for Horizon Europe confirming its commitment to Open Science: https://bit.ly/38cu6dL.
In brief, the Model Grant Agreement requests zero-embargo Open Access to publications & beneficiaries (or authors) must retain sufficient intellectual property rights to comply with the requirements thus further aligning with Plan S (cOAlitionS).
Beneficiaries must also establish a Data Management Plan (DMP) & deposit their data in a trusted repository.
Looking for guidance? Science Europe has developped a practical guide presenting guidance & core requirements for DMPs, plus criteria for selecting trustworthy repositories: https://scieur.org/rdm