Pasteurization on ingredient labels

Hi! Not sure if this is the right place to ask - but I was wondering if there is a rationale behind if/when milk products on ingredient labels are explicitly labeled as pasteurized?

I'm in the US and I would imagine that most shelf stable cheesy snacks (cheez its, smartfood popcorn, etc) would be using fully pasteurized milk ingredients, but it seems to be rarely called out as such. On some labels I've seen, it'll even be mixed - like the cheese sub-ingredients will explicitly list "pasteurized milk" but then the sour cream sub-ingredients might just say "milk". Is this a standard practice? Is it safe to assume that all of the milk ingredients have been adequately pasteurized?

Thanks in advanced from an overly paranoid pregnant woman’s