Any business for which an adult business license is required by this chapter shall by signage and other reasonable means put potential customers on notice that the business is an adult business from which persons under the age of 18 years are excluded. Such notice for a business establishment or premises shall include at least one sign conspicuously displayed at each entrance which shall have horizontal and vertical dimensions of least two feet by two feet and state "ADULTS ONLY" in bold letters at least six inches in height. (Added by Ord. 09-130, Dec. 9, 2009, Eff date Jan. 7, 2010).