Except as herein otherwise provided, buildings required to be numbered, lying westerly of a line parallel to and 100 feet easterly of the east line of Water Street and the east line of Water Street projected northerly and southerly to the northern and southern limits of the city, and erected upon lots abutting on streets and avenues running easterly and westerly, shall be numbered westerly from said line, beginning with the number 100 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 buildings on the north side of said streets and avenues and odd numbers to be used for such numbering on the south side of said streets and avenues. The first tier of blocks westerly of said line shall be numbered westerly, beginning with the number 100 on the north side of the streets and avenues and with the number 101 on the south side of said streets and avenues. The second tier of blocks westerly of said line shall be numbered westerly, beginning with the number 200 on the north side and the number 201 on the south side of said streets and avenues, and continuing in like manner, each successive tier of blocks lying westerly of said line shall be numbered westerly of said line shall be numbered westerly, giving 100 numbers to each tier of blocks, and ending such numbering at the western boundary line of the city. (Ord. 369 § 6, 1917)