Residential Zones. No signs or advertising devices shall be permitted in the Residential Zone except small professional announcement signs with the name of the resident, not over two square feet in area, and the name or announcement sign of a church or parish house and real estate "for sale" signs, not over four square feet in area; provided, however, that any of the signs permitted in this subsection may be used only with reference to the premises on which the same is displayed.
(1)
A billboard, signboard or advertising sign shall in no case be permitted as an accessory use. The placing of a "for sale" or "for rent" sign not exceeding four square feet in area shall, however, be permitted as an accessory use during the for-rent or for-sale period.
(2)
A sign necessary to the public welfare shall be permitted in the Residential Zone.