When applying for a DAU course in AITAS, I noticed a column heading of “Reserv Cut-Off”. What does this mean?

Courses with a Reserve Cut-Off have required pre-course work associated with the class. This is the last date that the USAASC course manager can give you a RESERVATION.  This does NOT mean that this is the last day that you can APPLY for the class.  Students who apply on the cut-off date will not get a reservation.  Students must submit their application through AITAS at https://www.atrrs.army.mil/aitas/, the supervisor must concur with the students request (through AITAS), and USAASC must approve the request.  All three steps must be completed on or before the reservation cut-off date as shown in AITAS.