Chapter 18F.40 SUBDIVISIONS – PRELIMINARY AND FINAL PLATS This chapter is included in your selections. Sections: 18F.40.010 Purpose. 18F.40.020 Applicability. 18F.40.030 Proposed Preliminary Plat Requirements. 18F.40.050 Model Homes. 18F.40.060 Final Plat Requirements. 18F.40.070 Preliminary Plats-Time Extensions. 18F.40.080 Proposed Alterations to a Recorded Final Plat. 18F.40.090 Phasing of a Subdivision.