No person who receives or expects to receive pecuniary gain from the sale of real property shall:
(a) Incite, arouse or refer to neighborhood unrest, community tension or racial, religious or nationality change in a neighborhood or on a particular street, for the purpose of or in connection with soliciting or inducing a listing of real property for sale or lease or inducing or promoting the sale or lease of real property;
(b) Promote or influence, or attempt to promote or influence, a property owner, occupant or tenant to list for sale, sell, remove from or lease real property by referring to race, color, religion or national origin of neighbors, tenants, prospective buyers or occupants of real property;
(c) Resort to or engage in any harassment, intimidation or threats in attempting to induce a property owner or tenant to list for sale, sell, remove from or lease real property. (Ord. 1964-54. Passed 5-12-64.)