Don't know how to quote multiple people on here (without messing it up), so I'll just respond.
PIMA, AROTC cadets have always worn uniforms during various training (you didn't dispute this), but differently from AFROTC in which uniform a certain class (100, 200, etc.), Cadet Command is specifically pushing wear of the ASU now as the uniform for non-field training.
JCleppe, ASU just refers to the entire uniform. You are correct in that they will have to wear a minimum of the Class B ASU uniform. This is also something straight from the top and is being implemented throughout all of USACC.
Thompson, everything I've seen on the topic suggests that the ones who will be primarily the focus of putting in ASU's are the contracted cadets, until either more uniforms are obtained to get non-contracted into. Those that are not contracted (and just attending the class) can't really be forced into any certain uniform. The guidance I saw from USACC said that non-contracted would just wear some sort of pants and either a polo shirt or something similar when the contracted cadets were in ASU's.
Within my brigade, when it came down, there were immediately a bunch of questions from various cadre about how this would be fully implemented, if this only applied to the schools and not to the brigade HQ's and USACC HQ, and a few others. Hopefully answers will flow down soon to get this whole thing implemented.