Though a minimum of two installations is required for a proposal to be eligible for access to NFFA-Europe, limited exceptions have been introduced to meet the needs of specific categories of users. Namely, are considered also eligible:

• Proposals that need combined access to fine analysis - e.g. employing both neutrons and synchrotron radiation at Large Scale Facilities to investigate the same sample system - even though the requested techniques belong to the same installation.

• Proposals requesting access to theoretical installations only,  if they address recent experimental results obtained at facilities other than NFFA-Europe's ones or requesting access to multi-scale/multi-physics simulations, if they combine at least two independent computational methods (e.g. electronic ground-state and excited-state approaches, molecular dynamics and electronic structure, structural and spectroscopic properties...). However, priority is given to proposals asking for combined access to experimental and theoretical NFFA installations (standard NFFA-Europe access rules).

• Proposals by SMEs requesting access to just one installation.