Even as California has relaxed mask-wearing requirements and other rules from the height of the coronavirus emergency, Napa Valley College will require students and faculty to cover their faces in most indoor spaces â except for selected activities for which masking is impractical â when classes resume next month. The two-year community collegeâs board of trustees approved a set of safety rules this week for the fall semester that continues a conservative approach to handling the risk of COVID-19 spread, generally mandating the use of protective masks in indoor settings even for those inoculated against the disease. For certain musical, athletic and other programs in which facial coverings would interfere with basic activities, participants will be required to receive full vaccination in order to study or teach.