The frat house is university property. The students lived there because they were members of Sigma Alpha Epsilon and SAE had use of the building. SAE has revoked the chapter charter, or whatever the word is, so SAE no longer has use of the house. Therefore the students aren't entitled to live there. Open and shut case.
So this overrules all eviction laws in the state for the students who established residency there? Having gone through the process and education of throwing someone out of my house, I’d likely go with not an open and shut case. After all, the presumptive requirement of membership is no longer a factor since the fraternity no longer has permission to use the building.