MSU continuing mask requirement in classrooms Beginning May 6, masks will be optional within some indoor locations on campus, including offices and public spaces such as hallways and restrooms. But they will still be required inside classrooms, laboratories and studios. Capacity limitations for indoor facilities on campus will increase to 75 percent, which includes auditoriums, meeting rooms and classrooms. MSU Chief Communications Officer Sid Salter said the university came to this conclusion after input and expertise from leadership, including President Mark Keenum, Vice President of Student Affairs Regina Hyatt, Provost and Executive Vice President David Shaw and other individuals and groups on campus.