Do access rights confer any entitlement to grant sub-licences?
No, unless the contractors so agree (Article II.35.1.c of Annex II to the FP6 model contract). The particular sublicensing terms and conditions may be agreed upon in the consortium agreement or a separate agreement, especially with the owner of the knowledge or pre-existing know-how. Note that the European Commission has foreseen a special clause (no. 20) for cases where contractors want the sublicensing of software to be a condition for granting access rights.