Im on an acreage and I am renting it while I have my apartment in the city is rented to tenants and funnily enough we too have had a few wasp nests on our property. I was actually stung last year while hedging but we had a huge wasp net right outside the bathroom window. I would say without any authority whatsoever that the tenant should just get rid of it and I cant believe they would say its your responsibility. They are very easy to remove.
In the darkness armed with a torch and scissors and a plastic bag approach it with the nest to fall in the plastic bag after one snip at it.
Tie the bag and dispose.
Done.