Monument signs. Upon any platted lot upon which the erection of a pole sign is permissible under this Section, there may instead be erected a monument sign which may direct attention to the businesses, commodities, services, entertainment or attractions conducted, sold, offered or existing upon the same platted lot where such sign is displayed, which shall be erected no closer than ten (10) feet from any property line, with a maximum height of eight (8) feet and a maximum square footage of one hundred (100) feet per side with no more than two (2) sides. The erection of both a monument and a pole sign upon the same platted lot is prohibited unless the platted lot is entitled to two (2) signs under Subsection (1)(c) of this Section, in which case monument signs may be substituted for either or both pole signs.