It is my interpretation that displacement stress range ("...the algebraic difference between strains in the extreme displacement condition and the original (as-installed) condition or any anticipated condition with a greater differential effect...")should not contain stresses from sustained loads. Otherwise we should use

L1=W+T1+P1(OPE)
L2=W+P1(SUS)
L3=WNC(SUS).... but is also an operating state
L4=L1-L2(EXP)
L5=L1-L3(EXP)

As far as I remember nobody use L5