The edict comes from a 2012 law that makes Times Square an arterial route to the national highway system. And that puts it under the 1965 Highway Beautification Act, which limits signs to 1,200 square feet. It took the feds until now to realize that Times Square was included.
"The fundamental principle of science, the definition almost, is this: the sole test of the validity of any idea is experiment." -- Richard P. Feynman