Sorry for the double post - didn't see an edit option on my last one..

I've been seeing posts here of people saying they have an upcoming 5-50 GC/MS Pre-Employment test coming up, and stuff like that... GC/MS testing is the most accurate UA (from what I've been reading), and I was under the impression that 99% of the time they do the simple lab test first, then any non-negative result gets sent to GC/MS testing.

So with people saying they have the upcoming GC/MS pre-employment UA test, does this just mean it will go to GC/MS if positive, or it will be that for the first step? If the employer tells me the same, 5-50 or 10-50 GC/MS test, will it just be the simple test to start with? Hope this is clear what I'm asking..