Not sure which part of my post you're referring to. If you're referring to the part about maintaining eligibility, that pertains to players who are playing on schoarship, and he won't be.
If you're referring to the part of my post that relates to intersession courses, those are counted for the subsequent semester. So---if I do 6 credits in winter intersession, I can do 6 credits in spring, and that counts as my required NCAA 12.
But, the university also has rules. To remain matriculated, you have to be at least half-time, unless you take a leave/get a waiver.
Think about why the intersessions count toward the following semester. Schools all over the country have totally different semesters, some are trimesters, some begin again in April--AFTER the NCAA tourney.
This is why the NCAA looks at aggregate credits for athletes maintaining eligibility. I know a kid that went through this at my university. He was looking at maintaining eligibility while doing half-semester courses, so he piled them on in winter intersession.