The article states that, but it is semi-official policy to let these units be. I think that if you made some random complaint about your neighbor's mother-in-la

The article states that, but it is semi-official policy to let these units be. I think that if you made some random complaint about your neighbor's mother-in-law unit, you would likely not get any action from the city. Therefore the complaint must have been fairly serious (or the developer pulled some strings).