Tire pressure stencile.. when do you need it?

Some units were putting the "T.P. 35" or whatever the TM's tire pressure was on the units vehicles long before the WDC came out. But, the official 'git-r-done' comes from:
WDC- 174 12 June 45
and where is the 'official' list of 'official' tire pressures?
TB 31-200-7 23May1945
The low down is:
WDC- 174 12 June 45
and where is the 'official' list of 'official' tire pressures?
TB 31-200-7 23May1945
The low down is: