(a) Definition. As used in this section, the term "approved numbers" shall mean Arabic numerals, of uniform height, made of some durable material which are sharply contrasted to the color of the material on which they are placed and are of a size capable of being distinctly readable from the street, but in no case less than four inches in height.

(b) Placing. Approved numbers shall be placed on each building or structure at such location thereon which is nearest to the street or road fronting the property, and in such a position as to be plainly visible and distinctly legible from the street or road. Approved numbers shall also be placed in such a position as to be plainly visible and distinctly readable from a fire lane at the rear of the building or structure when, for emergency purposes, access thereto is also from a fire lane. To the extent possible, approved numbers shall be located adjacent to light fixtures or other light source. (Code 1979, § 34-129)