General Provisions. Subject to other provisions of this Section, each developed lot may have a monument sign facing each roadway on which the lot has frontage regardless of the number of buildings upon the lot. However, each building, regardless of the number of lots upon which it may be located, shall have no more than one (1) monument sign facing each roadway on which its lot or lots has frontage. For the purpose of this regulation, an aggregation of two (2) or more structures connected by a wall, firewall, facade or other structural element, except for a sidewalk, shall constitute a single building. No monument sign shall exceed fifty (50) square feet in outline area per facing; nor exceed a width of ten (10) feet; nor extend more than ten (10) feet above the elevation of the adjacent street or elevation of the average finished ground elevation along the side of the building on the property facing the street, whichever is higher.