You have it backwards. And the FAA doesn't use the term "commercial" in it's regs. They still do in some of their summary pages though. And we've tried hard to get them to change some.
14 CFR Part 107 is the default regulations for 99%+ of the sUAS flight in the U.S. The others being Public COA and/or 333 (of which very few, if any, still exist). And you have some Part 135 flights, but for this discussion, let's go with 107 v. 44809.
As I mentioned, 107 is the default, and 44809 is the exception. So unless someone satisfies all 8 (7 until CBOs are published), they're flying under 107.
I'd shy away from asking the ASIs. Odds are they don't know, and will likely guess. KDEN FSDO actually reach out to me when they have a question about drone stuff like this. Instead, I suggest you use the faa.gov email I address posted above. If they don't know, they have the resources to find out.
My BIL basically did that. He was a lead mechanic at United here in Denver, but now he signs off on inspections. Sort of a pseudo FAA inspector. He answers to the FAA and United.
I have dishonored myself. :-(