No off-site sign or billboard shall be allowed where such sign faces the front or side yard of any lot within any residential zone, or any lot within any other zone which lot is used entirely for residential purposes, and is located within three hundred (300) feet of such lot line. No off-site sign or billboard shall be located on any vacant lot or parcel of land lying between two residential buildings where such buildings are less than three hundred (300) feet apart. (Ord. 2016-0010 § 17; prior code § 3.05.086)