Chapter 17.73 TREE CARE ORDINANCE This chapter is included in your selections. Sections: 17.73.010 Purpose. 17.73.020 Definitions. 17.73.030 Creation and Establishment of the City Tree Advisory Board. 17.73.040 Tree Maintenance and Protection. 17.73.050 Heritage Trees. 17.73.060 Planting and Replacement of Trees on Public Property. 17.73.070 Enforcement.