What is a third level? One that has as many different variations of aircraft as were made. One who keeps maintenance to a minimum thus requiring crews to fly with ever increasing MELs. One who may change a tire or fix a problem only when the crew demands it. One who washes the aircraft once a year. One who keeps the crews wondering if their checks will clear. One who has an ever increasing changover in support personnel due to the low pay and therefore getting the lowest of the low in competence and expierence. One who ignores the CBA's making sure crew morale is low.
One who has to go out and beg for work rather than having the customer knocking on their doors. I worked for one, now I don't; and what a difference!!
You may call them third level, I call them bottom feeders.