3.Exercises certificate authority and safety responsibility over a complex of broad and varied general aviation organizations such as air taxis, executive and/or industrial operators, repair stations, and flight and mechanic schools when the activities monitored equate collectively to a major air carrier in terms of size and complexity of aircraft fleet employed, scope and technical complexity of operations, management sophistication, industry leadership, and public impact. As the principal representative in regulatory surveillance of general aviation activities, exercises certificate authority; or evaluates maintenance activities and complete aircraft overhaul facilities (By comparison, FG-13 employees exercise certificate authority over less complex air carriers or perform major portions of the certification, inspection, and surveillance for major carriers under the direction of FG-14 inspectors.).