Large ceremonies, gatherings or processions for the entire school should not be held, and there should be no classes on flatbed trucks. Nor should any graduation ceremonies except for school-leaving examinations be held at the upper secondary school.
Handing out grades and smaller ceremonies for graduating classes in the upper secondary school are possible if they are arranged in a manner which minimises the risk of spreading COVID19.
"Utspring" (run out) for graduating students may take place if done one class at a time or in smaller groups. If this is the case, it should be done outdoors.  Risk groups and persons who have COVID19 should not attend.
The Public Health Agency of Sweden also writes that it's inappropriate with larger private parties, even if they are held at home and outside.