Some time back Chicago passed a law regarding smoking in certain public areas. Not surprising now but then maybe. But the funny thing was that passage of such a law made it clear that the people making these laws do not know what alraedy exists.
Prior to passage of the above mentioned law the City Code carried a law on smoking. I can not remember all of the particulars but it was Ch 100 1/2 (that is not a mistake, but the actual reference). The part I needed was related to smoking in schools. Smoking in schools was prohibited, except in administration offices on the first floor. For the school I was attending this meant that the head of the college could not smoke in his office as it was on the second floor.
The law was in place and enforceable but there was no penalty attached!
It does appear that the code has suffered some changes, though.