In practical applications, as the ones discussed in the next section, interspace excitations lie between these extremes, and in general closer to the lower extreme. As an example, we consider a system of five stacked benzene molecules, with an active space that includes the six π-orbitals of each benzene, and distributed into separate GAS subspaces. This system is discussed in greater details in Subsection 4.1. If we use cumulative constraints we can define