It is hereby required that no subdivision of any block, lot or sublot, or any part thereof, or any tract, piece or parcel of land within the City or in contiguous territory of subdivision review jurisdiction, which is within two (2) miles of the corporate limits or, in cases wherein another municipality (which has by ordinance availed itself of Section 354.9 provisions) is less than four (4) miles from the City corporate limits, then not less than one-half the distance between such limits as measured from the City (unless modified by Chapter 28E Agreements) shall be entitled to be recorded in the County or have any validity until it has been approved by the Council. Further, except as hereinafter modified, there is hereby adopted Chapter 354 of the Code of Iowa, by reference, as fully as if set forth herein in its entirety; and in the event there is a conflict between the provisions of said Chapter 354 and the provisions of this chapter, the more strict or stringent requirements or provisions shall be applicable. The provisions of this section are under the specific authority granted by Section 354.9 of the Code of Iowa.