Since the current version of the msu-thesis class satisfies the Graduate School requirements at any one time, as these requirements change, you may find that if you need to recompile your thesis after you have graduated that the formatting changes. To avoid this, I would recommend saving an archived version of the msu-thesis.cls file in the same folder as your thesis file. You only need to do this once you have completely finished your thesis however; there’s no need to do it during the writing process.