There are regulations here about all outdoor advertising. You need a permit under state law, and the city puts all kinds of size, shape, height, etc. restrictions on it, varying by neighborhood. They also placed one in a public transportation station, and for that you not only need approval, you have to pay their rates.
And you know for a fact there are no exceptions, or that they did not get the permits and approval, or that the fine is so small to be worth the effort. You know all of this right?