I don't believe NPIP tests for *all* pathogenic-to-humans salmonella species, does it? (or does it?) and in any case salmonella is not the only concern, there are other bacteria that can be present in poo (such as, but not limited to, certain strains of E coli) that can make you just as sick.
The recommendation is not to spread manure on food crops or the ground they grow on for 60 days before harvesting anything.
It is unwise to rely on hot composting to sterilize your manure, for normal people like us anyhow, because not all of the pile will get that hot.
However, once poo has composted, or sat out in the elements and soil, for several months, the pathogenic buggies will have generally gone all toes-up and you are pretty safe (safe as any dirt, anyhow).
Of course you *can* use fresher poo around food crops, just don't say we didn't warn you if you get all pukey
and it is probably not wise to sell stuff grown that way.
Pat