All land annexed into the City shall be placed in a zoning district most closely providing for the land use on said annexed land, or if undeveloped land, then a zoning district shall be assigned which in the judgment of the Council best provides for the land use plans of the landowner and also provides for the City’s public interest and community planning goals. Such zoning district assignment shall be identified in the annexation resolution or agreement and adopted by ordinance following normal City ordinance procedures. Such ordinance shall be adopted within 90 days of such land(s) being annexed to the City. Any land annexed to the City without a zoning district assigned at the time of annexation shall automatically have been placed in the R-1 Residential Zoning District.