Do the 3rd party inspection agencies work in certain areas only, or are they hired by the City or State?
Do they compete with each other?
Does one agency call out different code violations, and other's something else?
For example, the weep hole in the bottom of a panelboard cabinet, do they allow the GEC to pass through that hole with no connection to the enclosure, like you'd have if you used a knockout an a proper fitting?