The Massachusetts Institute of Technology will only allow some of its undergraduate students back on campus when classes resume this fall, according to the university's president.In a message to the campus community, MIT President L. Rafael Reif said the undergraduate residential student population will be much lower than normal capacity and does not know how many exactly will be able to return to campus. He said it could be as high as 60%, but likely much lower."Obviously, we cannot control the trajectory of the pandemic this fall, either here in Massachusetts or in the places around the world our students call home," Reif wrote. "We also have no control over the government response. We must accept these as unknowns and be ready to adapt."Reif revealed further details about MIT's on-campus plan for the 2020 fall semester.First, the university will maintain its basic two-semester structure for the 2020-21 academic year. However, the fall semester may need to start a week early around Sept. 1 and stop in-person classes before Thanksgiving and finish the semester remotely.Reif said material will be taught online as much as possible and those undergraduates who are on campus will have some small-group in-person learning experiences, with particular focus on classes that require access to labs, workshops and performance spaces.Every undergraduate living on MIT's campus will have an individual room to allow for proper physical distancing, but there were no further details about living situations.According to Reif, the university will share detailed plans for its undergraduate students no later than July 6."I join you in feeling frustrated by the persistent uncertainty of the situation. We need to make decisions with incomplete, imprecise and dynamic information, and we are taking time to consult broadly," Reif wrote. "As we try to find the best way to safely adapt the massive enterprise that is MIT to the shifting realities of the pandemic, I deeply appreciate your thoughtful problem-solving and continued patience."Reif did release MIT's order of eligibility to return to campus, which placed research staff and faculty at the top, followed by graduate students and then undergraduate students. Administrative and other non-research staff are last on the list, but most can work effectively online and some may be asked to work remotely through at least the fall semester to reduce the on-campus population.Those who return to the MIT campus for the fall semester must get tested for COVID-19 before returning and will be regularly tested thereafter. They will also undergo mandatory public health education and submit daily health reports via an app or website.The university will also require face masks to be worn on campus and physical distancing will be observed. Contact tracing efforts will also be made, along with enhanced cleaning protocols.There will be staggered scheduling and reconfigured work spaces, access to buildings will only be allowed through a single point with an MIT ID and there will be no large gatherings or lectures.Reif's entire message to the MIT community can be read by clicking this link.