I would recommend to arrive with a mask, and then observe and mimic the behaviour of the employees. If people on the corridors wear masks, keep yours on. If nobody wears a mask, take it off. If the behaviour is mixed, keep it on until the interview and ask the interviewers if they would prefer for you to conduct the interview with the mask or without it.

Remember, we are not wearing masks for our own protection, we are wearing them for the protection of others.

I would recommend to arrive with a mask and only take it off after you know if it's OK.

After your arrival, look out for any signs regarding the pandemic prevention rules which apply on the premise and follow them. When you can not find any, then observe and mimic the behaviour of the employees. If people on the corridors wear masks, keep yours on. If nobody wears a mask, take it off. If the behaviour is mixed, keep it on until the interview and ask the interviewers if they would prefer for you to conduct the interview with the mask or without it.

Remember, we are not wearing masks for our own protection, we are wearing them for the protection of others.