Lake Oswego School District will require masks for unvaccinated students under 12 The Oregon Department of Education is allowing districts to make their own safety plans. Lake Oswego worked with Clackamas County Public Health. Author: KGW Staff Updated: 8:23 PM PDT July 25, 2021 LAKE OSWEGO, Ore. — Lake Oswego released its draft health and safety plan that is set to be finalized on Monday, August 2. It outlines the mandates and practices that will be in place for when all students return to school full time. Masks Lake Oswego School District (LOSD) said it plans to mandate masks indoors for students under 12 who are not currently eligible for any vaccine. It is strongly recommended that unvaccinated students wear a mask but not mandatory. Masks are also required on public transit, including on school buses.