(1) General Requirements. Building numbering signs shall consist of a plate of identical numbers with the numbers being not less than 3 inches high, mounted so as to be horizontal to the streets or road abutting. The signs may be attached to a building when that building is within 100 feet of the road right-of-way. In all other instances, the signs shall be mounted on posts set at the right-of-way line of the road at a point not more than three feet to the right or left of the private driveway or walkway leading from the road to the building or property. The signs shall be far enough above the ground to be readily visible. As new buildings are constructed, the county surveyor shall assign numbers prior to the issuance of a building permit.

(2) Restrictions. No other signs except those specified above shall be erected or used under the building numbering plan established by this chapter.