Students returning to the St. Helena Unified School District next Wednesday will find full classrooms, a new principal, a new athletic director, and mandatory masking indoors â but not outdoors. Requiring masks indoors only is consistent with updated guidelines issued in July by the California Department of Public Health, which recommended making outdoor mask-wearing optional. During the last school year, masks were required indoors and outdoors except when eating. Superintendent Marylou Wilson said the district encourages staff and students 12 and over to get vaccinated as soon as possible, but it canât require vaccination. Support local news coverage and the people who report it by subscribing to the Napa Valley Register. Special offer: $1 for your first 6 months!