Wow, I can see why a lot of people would want to move into your apartment block before anything was implemented and stay there! It sounds almost as good as owning their own property. At the same time, to address your issue, it may be a fair idea to see if you can get the residents to meet up and figure out whether they agree with the by-law being passed as obviously they are not going to be happy to be charged fees for something that they’ve not been penalised for for such a long time! Be careful, people might start moving out!