The buildings along all throughways running in the general easterly and westerly direction shall be numbered both east and west from Front Street as the baseline. Two numbers shall be allowed for each twenty five feet of frontage on the throughway line and the numbering shall begin on the north side of the throughway with the number “2” and the even numbers shall be maintained on the north side of such throughway throughout – on the south side of the throughway the numbering shall begin with “1” and the odd numbers shall continue on the south side of the throughway throughout. Second and additional stories shall be designated by the addition of suite numbers to the number used for the ground floor. Each block shall begin with even hundreds from First Street west and from East First Street east, and units and tens shall be used in numbering the block from Front to First Street and from Front to East First Street.