on a single-state density matrix are admissible in selected multi-state Fock-space methods, such as equation-of-motion coupled-cluster (EOM-CC) theory . For example, multiple ionized states can be described in a balanced way by using a virtual space truncation scheme based on the density matrix computed for the closed-shell reference state because the principal character of ionized (i.e., hole) states is confined to the occupied orbital space. This idea , originally explored within FNOs , has been recently extended to the domain local pair natural orbitals . Here we extend the idea of using reference-state FNOs to other EOM-CC methods.