 In addition, it is currently somewhat unclear as to whether the Chinese theater commands or the PLARF itself has "operational" control over the conventional ballistic missile units, though it seems likely that the PLARF acts in coordination with, but not taking orders from, the theater commands with regards to the use of conventional ballistic missiles, with control of nuclear weapons continuing to be exercised at the Central Military Commission level.Furthermore, it appears that the number of missiles assigned to each Brigade differs by missile type, as well as the individual Brigade itself.In addition, the PLARF operates another Base, Base 67, which is responsible for nuclear warhead storage, warhead transport, warhead inspection and nuclear weapon's training.