As stated in Table 968-II of PI 968, Columns 2, 3 and 4 must not be mixed. The maximum limits are independent with each column and they cannot be combined. Each column must be separately packed in different outer packagngs. You may overpack such outer packagings in one overpack as permitted in Section II Overpack. Furthermore, as long as they do not react dangerously with each other, other dangerous goods and/or non-dangerous goods may be included in the same overpack.
However, packages of Section I, Section IA, Section IB must not be in the same overpack since the handling procedures for these shipments differ. The foregoing explanation also applies to shipments under Table 965-II of Section II for lithium-ion batteries.