From 1949 to 1959, the number of courses held increased from 6 to 64 and the number of students from 49 to 800. There were various causes of this rapid growth in enrollment. ENAC benefited from the spectacular development of air transport in the postwar years. But it would not have taken such an advantage if its teachings were not performant. Finally, one can not ignore the presence of a significant contingent of students from either foreign countries or – in even larger numbers – territories which would gain independence in the near future. In the early 1960s, the university was beginning to welcome its first students and trainees from foreign civil aviation authorities. Along with enrollment growth, new courses were created regularly. This creation is often a direct result of an administrative decision, as is case when a new rating is introduced. Thus, in 1956 the navigation instructor rating was introduced, with the opening of the corresponding training. Sometimes a course is simply set to meet a need. The same year 1956, for example, a speaking techniques course for instructors was introduced. Also in 1956 came the first "civilian" engineering students; that is, not officials. The openings of new training graduate courses, of course, is much less frequent than those of new continuous training, which occurs fairly regularly. In 1958, the airline pilots theoretical training course started.