The safety measures must be observed further on. Students, who have taken their seats in the middle of the lecture hall, must therefore ask their seat neighbours to stand up and to keep the passage free before they can leave their seat row.
The safety distance of at least one meter must be maintained throughout and safety masks must be worn again before leaving the own place. The toilets are assigned to the lecture halls and will be appropriately signposted to allow a regulated access to the toilets.
You can find more information on presence-exams in the Guideline for Presence Exams at TU Wien.