John Galban wrote:


I'm not sure if the restriction comes from the FAA or Chicago,

It comes from FAA because Chicago wouldn't fix it.


but
they probably can get away with it. Since the number of commercial
airline operations were restricted at ORD earlier this year, it would
not necessarily be discriminatory to restrict GA as well. Whether or
not the levels of restriction are equal is open to debate.

GA has many other places to go in or near Chicago.