The [5 • (6, 6)] GAS space with n exc = 1 and local constraints consists of 51 supergroups and 4.25 • 10 15 SDs, or 18 % of the CAS size, and requires 0.74 GB to store the PCHB probability distribution in memory. Conversely, the cumulative constraints lead to 81 supergroups and 5.22 • 10 15 SDs, or 22 % of the CAS size, and require 1.17 GB of memory to store the corresponding PCHB probability distributions. For a higher number of inter-space excitations the difference of Hilbert space sizes between local and cumulative constraints decreases further.