An X-factor here could be that the NCAA now claims they follow the rules of the federation governing the sport in question for Olympic purposes. This is recent, so traditionally they ignored FINA rules for swimming, FIFA for soccer, IAAF/WA for T&F, etc. I suspect the reason they now claim to have adopted all of these is to get rid of males in women's competition, or even more specifically, the very controversial 'trans woman' who was cleaning up medals in swimming.
So when FINA went 'no male', the NCAA could shut him/her down without actually making a similar rule themselves. They have already said they were doing this with all federations, so presumably they claim they will follow WA rules....and these include stack height limitations. By the way, mere hours ago, WA followed FINA's lead as far as men vs. women, so the likely intention of the NCAA adopting intetnational rules was fulfilled.
All that being said, do they really follow all federation rules, or just DSD and trans rules? Does their 3-point line follow FIBA's regulations or are they closer? Aren't their swimming pools 50 yards as opposed to 50 meters? It seems to me that they made the 'adopting international rules' policy simply to avoid bad press for un-PC sex/gender/etc. rulings. When federations were going that route, they found a way to jump aboard while still being able to say that they didn't make the anti-trans rules. FINA/WA/UCI did. They were just getting in line with international/Olympic norms.
In summary, they haven't literally adopted the WA rulebook. The stack height regulations will be ignored. They currently are ignoring it. The race prompting this thread demonstrates that.