101-615 - Temporary signs LAST AMENDED 6/28/2004 Temporary #signs# relating to sales or events of limited duration not to exceed 45 days may be displayed in a #show window# of a #building#. Such #signs# must be removed after the last day of the sale or event to which they pertain. Temporary #signs# shall not occupy more than 20 percent of the surface area of the window in which they are displayed.