Understand how the The Visual Artists Rights Act of 1990 impacts the Underground Railroad Murals

A recent article in Bloomberg highlights the challenges for artists creating work addressing social justice.  In particular, Sam Kerson's mural at the Vermont Law School is mentioned. 

"“There’s also an interesting temporal question there—is it possible that a work might have been of ‘recognized stature’ at one time, but could lose that status if it has fallen out of favor?” Lucas said. “And fallen out of favor with whom?”"