Chapter 18.24 PUBLIC LANDS AND INSTITUTIONAL DISTRICT – PLI DISTRICT This chapter is included in your selections. Sections: 18.24.010 Intent. 18.24.020 Permitted and principal uses and structures. 18.24.030 Conditional uses. 18.24.040 Minimum lot size. 18.24.050 Minimum setback requirements. 18.24.060 Maximum height of structures.