Our building has a no smoking policy and will be posting no smoking signage at all entrances "No smoking within 25 feet of building entrance." However, the windows on the second floor are operable and within range of 25 feet from the sidewalk (some less than 25 feet some more than 25 feet from the ground). What are the best options for the building with this scenario? To prevent all second floor windows from opening would cost $5,000. To change the signage to read "no smoking anywhere" doesn't seem to make sense either. It is a NYC building with only a portion of the sidewalk on the property. How best to meet this prerequisite?