Did people see this very interesting article in Hyperallergenic? I would recommend reading the comments as well. The notion of Fair Use and public art is an interesting one - while most PA program agreements typically specify retaining a range of fair uses for commissioned projects, it was eye opening to me see this NRA video even being defined as fair use. 

Sir Anish Kapoor’s Clenched Fist of Copyright, the Battle Over Fair Use, and the NRA hyperallergic.com Does an artist have the right to withhold their work when they don't agree with the political message?