Research operations moving to Phase 4 on May 21: Effective Friday, May 21, UD will take the next step in its phased approach to the return of research operations, moving from Phase 3 to Phase 4. All on-campus research will be permitted â no application required â including undergraduate research, computational research, in-person human subjects research, and outreach activities. Please note that shuttered buildings/facilities need to be approved for reopening before personnel can enter. (See below for more information on that process.) When indoors: Face coverings are required of all individuals. Maintain physical distancing of at least 3 feet. When outdoors: Face coverings are required if you are unable to maintain physical distancing of 3 feet.