to prescribe & control the duties & proceedings of all officers, servants & others with respect to the buildings, lands, appurtenances & other property & interests of the university
The language here is interesting as it avoids using the word "slave". It instead describes the people who would work on the university as "officers, servants, and others". In other words, it tiptoes around the word in order to avoid the harsh reality of the situation. In fact, in this entire document, the word "slave" is only used once. And even here it is describing the property of someone else, rather than the university. I think that even though it was generally accepted at the time that slaves would be building this university, these writers still had to be careful with their language in order to get their proposal approved.
https://www.whitehousehistory.org/questions/did-slaves-build-the-white-house
This reminds me of the rhetoric used when building the White House. It was originally planned that Europeans would come to the U.S to build the White House, however this plan and talk quickly changed, and slaves were forced construct this landmark.