Except as herein otherwise provided, buildings required to be numbered, lying south of a line parallel to and 400 feet north of the north line of Florida Avenue and the north line of Florida Avenue projected easterly and westerly to the eastern and western limits of the city, and erected upon lots which abut on streets or avenues running northerly and southerly, shall be numbered southerly from said line, beginning with the number 1500 and allowing 100 numbers to each block, both sides of a street or avenue being considered a block, the even numbers to be used for numbering houses and other buildings on the west side of said streets and avenues and odd numbers to be used for such numbering on the east side of said streets and avenues. The first tier of blocks south of said line shall be numbered southerly, beginning such numbering with the number 1500 on the west side of the streets and avenues and with the number 1501 on the east side of the streets and avenues. The second tier of blocks south of said line shall be numbered southerly, beginning with the number 1600 on the west side and number 1601 on the east side of the streets or avenues, and continuing in like manner each successive tier of blocks, lying south of said line, shall be numbered southerly, giving 100 numbers to each tier of blocks, and ending such numbering at the southern boundary line of the city. (Ord. 369 § 4, 1917)