Exercises certificate authority and safety responsibility over a complex of broad and varied general aviation organizations such as air carriers, executive and/or industrial operators, designees, and flight 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. The minimum medical requirements include the following requirements: Have good distant vision in each eye and be able to read, without strain, printed materials the size of typewritten characters (glasses and contact lenses permitted); Have the ability to hear the conversational voice (hearing aid permitted); and.