Can students enter the ULAT at any point of their studies?

Excellent question and, no, definitely not. Students need to enter the ULAT at its very beginning (lesson 1.1). Students who have previously studied the language by means of another program would have two great handicaps were they to enter the ULAT, for example, in the second year of studies. First, they would miss out on the oral skill development that plays such an important role in the ULAT’s first year and, consequently, would not have been trained in the thought process employed by a native speaker. Secondly, and very practically, none of the ULAT’s symbols, which are presented in context starting in the earliest lessons of Unit 1, would have any meaning for such a student.