Got a new job. They didn't screen for THC during the onboarding UA. Would they screen for it if I happened to get a random test later?

I'm new to the area and came from a state in the southeast where THC is illegal.

I just started at a job where they didn't test for THC during my onboarding. Specifically the drug test said "Pre-Employment Drug Test (Panel #65786N w/o THC)".

However, I was looking through the corporate literature and it said that even though weed is legal in Oregon, it is still federally illegal. Then in the same section, it said that the company doesn't tolerate its employees using illegal drugs.

I'm wanting to try what the state has to offer, but I'm paranoid that if I get a random screen later and it checks for THC, then I'm screwed.

For reference, my job is healthcare adjacent, but I work at a desk and do not treat patients directly.

Has anyone else navigated a similar situation? Is this simply a case where the policies/laws haven't caught up with the times?