| http://www.w3.org/ns/prov#value | - Building access free of obstruction No sign or its supporting members shall be erected, altered, or relocated so as to interfere with or restrict access to a window or other opening in a building in such a manner as to unduly limit air circulation or obstruct or interfere with the free use of a fire escape, exit, standpipe, stairway, door, ventilator, or window, or similar opening, provided, howev
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