41 Vocational education in the fields of aviation operations, airline operations, and pilot training; training services in the field of aviation; educational services, namely, conducting classes, seminars, conferences, workshops, retreats, camps and field trips in the field of aviation; educational services, namely, conducting classes, seminars, conferences, workshops, retreats, camps and field trips in the field of aviation and distribution of training material in connection therewith; leadership development training in the field of aviation; training in the use and operation of aircraft and consultation relating thereto; providing facilities for aviation, airline, and pilot training; educational services, namely, providing training of pilots for certification in the field of aviation; education services, namely, providing career re-training in the form of classes, seminars, conferences, workshops, retreats, camps and field trips in the field of aviation; business training in the field of aviation, airlines, and piloting aircraft; educational services, namely, conducting programs in the field of aviation; vocational education in the field of aviation