For the purpose of numbering and more particularly locating all businesses, houses and residences of the City on the streets and avenues thereof, a line along the center of the right-of-way of the Missouri, Kansas & Texas Railway from the northern to the southern limits of the City shall be the base line or dividing line between the east and west portions of the City and all streets and avenues which cross the MK&T Railway shall have prefixed to the official name of the street or avenue, the word "East" or "West" according as that portion of the street or avenue lies eastward or westward from railway. Foley Avenue and McKinley Avenue shall have prefixed to the official name the word "North" or "South" according as that portion of the street lies northward or southward from Foley Avenue or McKinley Avenue. Where streets do not have the same name on each side of the base line these additional designations shall not be required. All house numbering of the City shall proceed eastward, westward, northward and southward from these base lines. (Prior Code § 28)