The subdivider, upon completion of curbs and streets, shall place the street number of each lot in the subdivision on the curb or other conspicuous place approved by the Township Engineer in size and color designed to make said street numbers readily and distinctly discernible from the street. Unless otherwise permitted by the Engineer, such numbers shall be block style, four inches in height, 3/4 inch shape width, painted in white fluorescent paint on a black background extending at least one inch beyond the number on all sides.