Chapter 20.40 PLANNED DEVELOPMENT (PD) DISTRICT This chapter is included in your selections. Sections: 20.40.010 Intent, regulations, and prerequisites. 20.40.020 General. 20.40.030 Origination of proposals. 20.40.040 Rules and procedures. 20.40.050 Limitation of revisions to the Unified Development Code. 20.40.060 Designation of permanent open space.